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89-534: The diamond was sold at an auction on 9 October 2006 in Antwerp , Belgium , for US$ 12.4 million. The buyer, The South African Diamond Corporation (SAFDICO) , expected to sell the diamond for more than US$ 20 million after cutting. In July 2007 the finished stones were unveiled. The largest gem cut from the crystal is a 75 carats (15.0 g) pear-shaped diamond, and the smallest is a 0.55 carats (0.110 g) round brilliant. In all, twenty-six stones were fashioned from

178-458: A family home being sold by the heirs). However, more recently, selling at auction has become an alternative to a normal property sale, due to the speedy nature of the entire process. In China, land auctions are under the sole control of local government officials. Because some developers may use bribes to please government officials to obtain the right to purchase the land, the central government requires that future land auctions be conducted using

267-510: A footrace , were used instead of the expiration of a candle. This type of auction was first mentioned in 1641 in the records of the House of Lords. The practice rapidly became popular, and in 1660 Samuel Pepys ' diary recorded two occasions when the Admiralty sold surplus ships "by an inch of candle". Pepys also relates a hint from a highly successful bidder who had observed that, just before expiring,

356-406: A spectrum auction in order to prevent the spread of corruption. Although this method cannot completely solve the problem of corruption, it is still a significant contribution to the auction. A government auction is simply an auction held on behalf of a government body generally at a general sale. Items for sale are often surplus needed to be liquidated. Auctions ordered by estate executors enter

445-484: A bidder can specify that they will pay for items A and B, but only if they get both . In combinatorial auctions, determining the winning bidder(s) can be a complex process where even the bidder with the highest individual bid is not guaranteed to win. For example, in an auction with four items (W, X, Y and Z), if Bidder A offers $ 50 for items W & Y, Bidder B offers $ 30 for items W & X, Bidder C offers $ 5 for items X & Z and Bidder D offers $ 30 for items Y & Z,

534-416: A bidding sheet often left on a table near the item. At charity auctions, bid sheets usually have a fixed starting amount, predetermined bid increments, and a "guaranteed bid" amount which works the same as a "buy now" amount. Other variations of this type of auction may include sealed bids. The highest bidder pays the price they submitted. In private value auctions , every bidder has their own valuation of

623-553: A brief civil war. Didius was beheaded two months later when Septimius Severus conquered Rome. From the end of the Roman Empire to the 18th century, auctions lost favor in Europe, while they had never been widespread in Asia. In China, the personal belongings of deceased Buddhist monks were sold at auction as early as the seventh century AD. The first mention of "auction", according to

712-491: A candle-wick always flares up slightly: on seeing this, he would shout his final – and winning – bid. The London Gazette began reporting on the auctioning of artwork in the coffeehouses and taverns of London in the late 17th century. The first known auction house in the world was the Stockholm Auction House , Sweden ( Stockholms Auktionsverk ), founded by Baron Claes Rålamb in 1674. Sotheby's , currently

801-569: A daughter, Didia Clara , their only child. In succession Julianus held the offices of quaestor and aedile , and then, around 162, was named as praetor . He was nominated to the command of the Legio XXII Primigenia in Mogontiacum (now Mainz ). In 170, he became praefectus of Gallia Belgica and served for five years. After repelling an invasion by the Chauci , a tribe dwelling in

890-530: A day in New South Wales . In timber auctions, companies purchase licenses to log on government land. In timber allocation auctions, companies purchase timber directly from the government. In electricity auctions , large-scale generators and distributors of electricity bid on generating contracts. Produce auctions link growers to localized wholesale buyers (buyers who are interested in acquiring large quantities of locally grown produce). Online auctions are

979-472: A demotion for political reasons, as Commodus , the Roman Emperor at the time, feared Julianus' growing power. It was around this time that he was charged with having conspired against the life of Commodus, but the jury acquitted him and instead punished his accuser. Afterwards, he governed Bithynia and succeeded Pertinax as the proconsul of North Africa . After the murder of Pertinax on 28 March 193,

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1068-465: A descending English auction. Fattigauktion is a similar Swedish practice involving poor people being auctioned to church organizations. Trade of wives by auctions was also a common practice throughout history. For instance, in the old English custom of wife selling , a wife was divorced by selling her in a public auction for the highest bid. ISIS conducted slave auctions to sell up to 7,000 Yazidi women as reported in 2020. A virginity auction

1157-762: A form of E-commerce that relies on the advantages of a digital platform's ability to overcome geographical constraints, provide real-time information and reduce transaction costs, bringing greater convenience to people and allowing more people to participate as bidders, as well as being able to view a greater selection of auctions. Websites like eBay provide a potential market of millions of bidders to sellers. Established auction houses, as well as specialist internet auctions, sell many things online, from antiques and collectibles to holidays, air travel, brand new computers, and household equipment. Private electronic markets use combinatorial auction techniques to continuously sell commodities (coal, iron ore, grain, water, etc.) online to

1246-433: A greater number of bidders due to the possibility of a bargain. If more bidders attend the auction, a higher price might ultimately be achieved because of heightened competition from bidders. This contrasts with a reserve auction , where the item for sale may not be sold if the final bid is not high enough to satisfy the seller. In practice, an auction advertised as "absolute" or "no-reserve" may nonetheless still not sell to

1335-478: A higher price. In 2008, the US National Auctioneers Association reported that the gross revenue of the auction industry for that year was approximately $ 268.4 billion, with the fastest growing sectors being agricultural, machinery, equipment, and residential real estate auctions. The auctions with the largest revenue for the government are often spectrum auctions (typical revenue

1424-742: A mob even obstructed his progress to the Capitol by pelting him with large stones. When news of the public anger in Rome spread across the Empire, three influential generals, Pescennius Niger in Syria , Septimius Severus in Pannonia , and Clodius Albinus in Britain , each able to muster three legions , rebelled. They refused to accept Julianus' authority as emperor and instead each declared himself emperor. Julianus declared Severus

1513-444: A pre-qualified group of buyers (based on price and non-price factors). Furthermore, online auctions facilitate the process for prospective bidders to discover and evaluate items by enabling searches across numerous auctions and employing filters to refine their selections. Didius Julianus Marcus Didius Julianus ( / ˈ d ɪ d i ə s / ; 29 January 133 – 2 June 193) was Roman emperor from March to June 193, during

1602-462: A public enemy because he was the nearest of the three to Rome, making him the most dangerous foe. Julianus sent senators to persuade Severus' legionaries to abandon him, a new general was nominated to replace him, and a centurion dispatched to take Severus' life. The Praetorian Guard had rarely fought in field battles, so Julianus marched them into the Campus Martius and drilled the guard in

1691-480: A response to their bids. These traffic lights depend on the position of the last bid in the distribution of all bids. A buyout auction is an auction with an additional set price (the 'buyout' price) that any bidder can accept at any time during the auction, thereby immediately ending the auction and winning the item. This means that if an item offers its buyout price at the beginning, one participant can stop all other potential participants from bidding at all, or stop

1780-402: A running race. Bidding fee auction , a variation of all-pay auction, also known as a penny auction, often requires that each participant must pay a fixed price to place each bid, typically one penny (hence the name) higher than the current bid. When an auction's time period expires, the highest bidder wins the item and must pay a final bid price. Unlike in a conventional auction, the final price

1869-417: A sealed bid. The higher bidder wins, paying either the first or second price. Both finalists receive a premium: a proportion of the excess of the second price over the third price (at which English auction ended). An Anglo-Dutch auction starts as an English or Japanese auction and then continues as a Dutch auction with a reduced number of bidders. A French auction is a preliminary sealed-bid auction before

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1958-476: A sealed-bid auction, bidders only get to know if their bid was the best. Best/not best auctions are sealed-bid auctions with multiple bids, where the bidders submit their prices like in English auction and get responses about the leadership of their bid. Rank auction is an extension of best/not best auction, where the bidders also see the rank of their bids. Traffic-light auction shows traffic lights to bidders as

2047-475: A spear into the ground around which the spoils of war were left, to be auctioned off. Slaves, often captured as the "spoils of war", were auctioned in the Forum under the sign of the spear, with the proceeds of sale going toward the war effort. The Romans also used auctions to liquidate the assets of debtors whose property had been confiscated. For example, Marcus Aurelius sold household furniture to pay off debts,

2136-537: A vehicle for hosting auctions themselves. As already mentioned in the history section, auctions have been used to trade commodified people from the very first. Auctions have been used in slave markets throughout history until modern times in the post-Gaddafi era Libya . The word for slave auction in the Atlantic slave trade was scramble . A child auction is a Swedish and Finnish historical practice of selling children into slavery-like conditions by authorities using

2225-422: A winner partially based on randomness. The final price for the selected winner is not always conducted according to their final bid. In the case of the second-price ruling as in a Vickrey auction , the final price for the winner is based on the second bidder's price. A Proxy bid is a special case of second-price ruling used by eBay , where a predefined increment is added to the second highest bid in response to

2314-431: A yet higher bid. Auctions with more than one winner are called multi-winner auctions . Multiunit auction , Combinatorial auction , Generalized first-price auction and Generalized second-price auction are multi-winner auctions. Auctions can be cascaded, one after the other. For instance, an Amsterdam auction is a type of premium auction which begins as an English auction. Once only two bidders remain, each submits

2403-421: Is a common method for the sale of real estate . Auctions were traditionally used as an alternative to the private sale/treaty method to sell property that, due to their unique characteristics, were difficult to determine a price for. The law does not require a vendor to disclose their reserve price prior to the auction. During the 1990s and 2000s, auctions became the primary method for the sale of real estate in

2492-407: Is a double auction in which the auctioneer takes bids from both buyers and sellers in a market of multiple goods. The auctioneer progressively either raises or drops the current proposed price depending on the bids of both buyers and sellers, the auction concluding when supply and demand exactly balance. As a high price tends to dampen demand while a low price tends to increase demand, in theory there

2581-455: Is a particular price somewhere in the middle where supply and demand will match. A Barter double auction is an auction where every participant has a demand and an offer consisting of multiple attributes and no money is involved. For the mathematical modelling of satisfaction level, Euclidean distance is used, where the offer and demand are treated as vectors. Auctions can be categorized into three types of procedures for auctions depending on

2670-407: Is a secret reserve price auction. However, potential bidders may be able to deduce an approximate reserve price, if one exists at all, from any estimate given in advance by the auction house. The reserve price may be fixed or discretionary . In the latter case, the decision to accept a bid is deferred to the auctioneer, who may accept a bid that is marginally below it. A reserve auction is safer for

2759-408: Is a variant of the English auction in which bids are written on a sheet of paper. At the predetermined end of the auction, the highest listed bidder wins the item. This auction is often used in charity events, with many items auctioned simultaneously and "closed" at a common finish time. The auction is "silent" in that there is no auctioneer selling individual items; the bidders write their bids on

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2848-660: Is called auction theory . The open ascending price auction is arguably the most common form of auction and has been used throughout history. Participants bid openly against one another, with each subsequent bid being higher than the previous bid. An auctioneer may announce prices, while bidders submit bids vocally or electronically. Auctions are applied for trade in diverse contexts . These contexts include antiques , paintings , rare collectibles , expensive wines , commodities , livestock , radio spectrum , used cars , real estate , online advertising , vacation packages, emission trading , and many more. The word "auction"

2937-522: Is derived from auctus , the past participle of the Latin verb augeō , ("I increase"). Auctions have been recorded as early as 500 BC. According to Herodotus , in Babylon, auctions of women for marriage were held annually. The auctions began with the woman the auctioneer considered to be the most beautiful and progressed to the least beautiful. It was considered illegal to allow a daughter to be sold outside of

3026-461: Is derived from the Vickrey auction and means the final deal sealing for the number one bidder is based on the second bidder's price. A No-reserve auction (NR), also known as an absolute auction , is an auction in which the item for sale will be sold regardless of price. From the seller's perspective, advertising an auction as having no reserve price can be desirable because it potentially attracts

3115-453: Is estimated in billions of euros) and quota auctions. In 2019, Russia's crab quota was auctioned for €2 billion. Between 1999 and 2002, the British government auctioned off their gold reserves , raising approximately $ 3.5 billion. The most expensive item to ever be sold in an auction is Leonardo da Vinci's Salvator Mundi in 2017 ($ 450.3 million). In 2018, the yearly revenues of

3204-478: Is the voluntary practice of individuals seeking to sell their own virginity to the highest bid. Cricket players are routinely put up for auction, whereby cricket teams can bid for their services. Indian Premier League (IPL) started annual public auctioning of cricket players in 2008 as an entertainment for mass consumption. Also, Bangladesh Premier League conducts cricket player auctions , starting in 2012. In some countries, such as Australia , auctioning

3293-404: Is traded in the international market. The wine auction business offers serious collectors an opportunity to gain access to rare bottles and mature vintages, which are not typically available through retail channels. In livestock auctions, sheep, cattle, pigs and other livestock are sold. Sometimes very large numbers of stock are auctioned, such as the regular sales of 50,000 or more sheep during

3382-424: Is typically much lower than the value of the item, but all bidders (not just the winner) will have paid for each bid placed; the winner will buy the item at a very low price (plus price of rights-to-bid used), all the losers will have paid, and the seller will typically receive significantly more than the value of the item. A senior auction is a variation on the all-pay auction, and has a defined loser in addition to

3471-399: Is usually a process of buying and selling goods or services by offering them up for bids , taking bids, and then selling the item to the highest bidder or buying the item from the lowest bidder. Some exceptions to this definition exist and are described in the section about different types . The branch of economic theory dealing with auction types and participants' behavior in auctions

3560-423: Is usually sealed and the uniform price paid by the investors is typically the best non-winning bid. In most cases, investors can also place so-called non-competitive bids , which indicates interest to purchase the debt obligation at the resulting price, whatever it may be. Some states use courts to run such auctions . In spectrum auctions conducted by the government, companies purchase licenses to use portions of

3649-512: The Oxford English Dictionary , appeared in 1595. In some parts of England during the 17th and 18th centuries, auctions by candle began to be used for the sale of goods and leaseholds. In a candle auction, the end of the auction was signaled by the expiration of a candle flame, which was intended to ensure that no one could know exactly when the auction would end and make a last-second bid. Sometimes, other unpredictable events, such as

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3738-597: The Senate and the Praetorian Guard, Julianus was killed by a soldier in the palace and succeeded by Severus. Julianus was born to Quintus Petronius Didius Severus and Aemilia Clara. His father came from a prominent family in Mediolanum , modern-day Milan , and his mother was a North African woman of Roman descent, from a family of consular rank. His brothers were Didius Proculus and Didius Nummius Albinus. His date of birth

3827-531: The Year of the Five Emperors . Julianus had a promising political career, governing several provinces, including Dalmatia and Germania Inferior , and defeated the Chauci and Chatti , two invading Germanic tribes. He was even appointed to the consulship in 175 along with Pertinax as a reward, before being demoted by Commodus . After this demotion, his early, promising political career languished. Julianus ascended

3916-447: The drainage basin of the river Weser , the northwestern coastal area of present-day Germany, he was raised to the consulship in 175 along with Pertinax. He further distinguished himself in a campaign against the Chatti , governed Dalmatia and Germania Inferior . He was then made prefect, charged with distributing money to the poor of Italy . Modern historians generally consider this

4005-429: The electromagnetic spectrum for communications (e.g., mobile phone networks). In certain jurisdictions, if a storage facility 's tenant fails to pay rent, the contents of their locker(s) may be sold at a public auction. Several television shows focus on such auctions, including Storage Wars and Auction Hunters . Auctions are used to trade commodities ; for example, fish wholesale auctions. In wool auctions, wool

4094-438: The top-up auction is primarily used for charity events. Losing bidders must pay the difference between their bid and the next lowest bid. The winning bidder pays the amount bid for the item, without top-up. In a Chinese auction , bidders make sealed bids in advance and their probability of winning grows with the relative size of their bids. In usual auctions like the English one, bids are prices. In Dutch and Japanese auctions,

4183-587: The Praetorian guard announced that the throne was to be sold to the man who would pay the highest price. Titus Flavius Claudius Sulpicianus , prefect of Rome and Pertinax's father-in-law, who was in the Praetorian camp ostensibly to calm the troops, began making offers for the throne. Meanwhile, Julianus also arrived at the camp, and since his entrance was barred, shouted out offers to the guard. After hours of bidding, Sulpicianus promised 20,000 sesterces to every soldier; Julianus, fearing that Sulpicianus would gain

4272-437: The U.S. carry the unofficial title of "colonel". Tobacco auctioneers in the southern United States in the late 19th century had a style that mixed traditions of 17th century England with chants of slaves from Africa. The development of the internet has led to a significant rise in the use of auctions, as auctioneers can solicit bids via the internet from a wide range of buyers in a much larger variety of commodities than

4361-411: The actual auction, whose reserve price it determines. A sequential auction is an auction where the bidders can participate in a sequence of auctions. A Calcutta auction is a subtype of sequential auction, where the ordering in the sequence is determined by random. A simultaneous ascending auction is an opposite of a sequential auction, where the auctions are run in parallel. The silent auction

4450-509: The ambassadors sent to turn his troops. Cassius Dio maintained that the Praetorian Guard tried to fight back, but were crushed, while modern historians believe that the Praetorian Guard simply abandoned Julianus, deserting en masse . Julianus attempted to negotiate with Severus, offering to share the empire with his rival, but Severus ignored these overtures and pressed forward. As he marched, more and more cities in Italy supported his claim to

4539-614: The assets of individuals who have perhaps died intestate (those who have died without leaving a will), or in debt. In legal contexts where forced auctions occur, as when one's farm or house is sold at auction on the courthouse steps. Property seized for non-payment of property taxes , or under foreclosure , is sold in this manner. Police auctions are generally held at general auctions, although some forces use online sites including eBay, to dispose of lost and found and seized goods. Debt auctions, in which governments issue and sell debt obligations , such as bonds , to investors. The auction

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4628-559: The auction method. Attractive maidens were offered in a forward auction to determine the price to be paid by a swain, while unattractive maidens required a reverse auction to determine the price to be paid to a swain. Auctions took place in Ancient Greece , other Hellenistic societies, and also in Rome . During the Roman Empire , after a military victory, Roman soldiers would often drive

4717-472: The auctioned good. A common value auction is opposite, where the valuation of the auctioned good is identical among the bidders. The range of auctions' contexts is extremely wide and one can buy almost anything, from a house to an endowment policy and everything in between. Some of the recent developments have been the use of the Internet both as a means of disseminating information about various auctions and as

4806-419: The best price among interested buyers, reverse auctions and buyer-determined auctions give buyers a chance to find the lowest-price supplier. During a reverse auction, suppliers may submit multiple offers, usually as a response to competing suppliers' offers, bidding down the price of a good or service to the lowest price they are willing to receive. A reverse price auction is not necessarily 'descending-price' —

4895-441: The bidding process before the bid price has reached the buyout price. If no bidder chooses to utilize the buyout option before the end of bidding, the highest bidder wins and pays their bid. Buyout options can be either temporary or permanent . In a temporary-buyout auction the option to buy out the auction is not available after the first bid is placed. In a permanent-buyout auction the buyout option remains available throughout

4984-456: The bids are confirmations. In a version of the Brazilian auction , bids are numbers of units being traded. Structure elements of a bid are called attributes. If a bid is one number like price, it is a single-attribute auction . If bids consists of multiple-attributes, it is a multi-attribute auction . A Yankee auction is a single-attribute multiunit auction running like a Dutch auction, where

5073-450: The bids are the portions of a total amount of identical units. The amount of auctioned items is firm in a Yankee auction unlike a Brazilian auction. The portions of the total amount, bidders can bid, are limited to lower numbers than the total amount. Therefore, only a portion of the total amount will be traded for the best price and the rest to the suboptimal prices. In an English auction, all current bids are visible to all bidders and in

5162-486: The construction of fortifications and field works. Despite this training, the Praetorian Guard was still undertrained compared to the field legionaries of Severus. Severus first secured the support of Albinus, declaring him Caesar , and then seized Ravenna and its fleet. Severus killed Tullius Crispinus , the Praetorian prefect , who was sent to negotiate with Severus and slow his march on Rome, and won over to his cause

5251-535: The currency devaluation was comparatively minor, he restarted the trend of devaluing the Roman currency which had abated under Pertinax 's reign. The trend he started, which would continue under the Severan dynasty on a far larger scale, destroyed confidence in Rome's currency, led to rampant hyperinflation, and caused widespread economic upheaval. Moreover, his blatant purchase of the throne shattered any illusions of normalcy in

5340-410: The denarius to 87%, whereas Didius Julianus ordered it reduced to 75%, nearly the adulterated amount that was present during the reign of Commodus. Because Julianus bought his position rather than acquiring it conventionally through succession or conquest, he was a deeply unpopular emperor. When Julianus appeared in public, he frequently was greeted with groans and shouts of "robber and parricide". Once,

5429-549: The emergence of the internet, online auctions have developed, with eBay being the most typical example. For example, if someone owns a rare item, they can display the item through an online auction platform. Interested parties may place bids, with the highest bidder winning the opportunity to purchase the item. Online auctions allow more people to participate and also make traditional auction theory more complex. By increasing visibility of an item and therefore demand , auctions can make an extremely rare item more likely to sell for

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5518-449: The end of the 18th century, auctions of art works were commonly held in taverns and coffeehouses . These auctions were held daily, and auction catalogs were printed to announce available items. In some cases, these catalogs were elaborate works of art themselves, containing considerable detail about the items being auctioned. At the time, Christie's established a reputation as a leading auction house, taking advantage of London's status as

5607-399: The entire auction until the close of bidding. The buyout price can either remain the same throughout the entire auction, or vary throughout according to rules or simply as decided by the seller. The winner selection in most auctions selects the best bid. Unique bid auctions offer a special winner selection: the winner is the bidder with the lowest unique bid. The Chinese auction selects

5696-468: The fifth milestone on the Via Labicana . The Senate passed a damnatio memoriae motion to condemn Julianus and his legacy. Severus dismissed the Praetorian Guard and executed the soldiers who had killed Pertinax, the previous emperor. Julianus repelled invasions by the Chatti and the Chauci , both of which helped protect Rome's border provinces. In the long run, the two tribes he repelled were but

5785-402: The following list. Auctions can differ in the number and type of participants. There are two types of participants: a buyer and a seller . A buyer pays to acquire a certain good or service, while a seller offers goods or services for money or barter exchange. There can be single or multiple buyers and single or multiple sellers in an auction. If just one seller and one buyer are participating,

5874-472: The harbingers of far larger Germanic migrations that would only truly finish in the sixth century AD. From arguably the reign of M. Aurelius, Rome would be constantly subject to incursions from the descendants of these tribes (see Crisis of the Third Century and Migration Period ). As emperor, Didius Julianus was unable to pass any major policy reforms in his short reign other than currency devaluation. While

5963-412: The highest bidder on the day, for example, if the seller withdraws the item from the auction or extends the auction period indefinitely, although these practices may be restricted by law in some jurisdictions or under the terms of sale available from the auctioneer. A reserve auction is an auction where the item for sale may not be sold if the final bid is not high enough to satisfy the seller; that is,

6052-574: The major centre of the international art trade after the French Revolution . The Great Slave Auction took place in 1859 and is recorded as the second largest single sale of enslaved people in U.S. history — with 436 men, women and children being sold. During the American Civil War , goods seized by armies were sold at auction by the Colonel of the division. Thus, some of today's auctioneers in

6141-551: The occurrence of a price development during an auction run and its causes. Multiunit auctions sell more than one identical item at a time, rather than having separate auctions for each. This type can be further classified as either a uniform price auction or a discriminatory price auction . An example for them is spectrum auctions . A combinatorial auction is any auction for the simultaneous sale of more than one item where bidders can place bids on an "all-or-nothing" basis on "packages" rather than just individual items. That is,

6230-403: The process is not considered to be an auction. The forward auction is the most common type of auction — a seller offers item(s) for sale and expects the highest price. A reverse auction is a type of auction in which the roles of the buyer and the seller are reversed, with the primary objective to drive purchase prices downward. While ordinary auctions provide suppliers the opportunity to find

6319-475: The reverse Dutch auction is an ascending-price auction because forward Dutch auctions are descending. By revealing the competing bids in real-time to every participating supplier, reverse auctions promote "information transparency". This, coupled with the dynamic bidding process, improves the chances of reaching the fair market value of the item. A double auction is a combination of both forward and reverse auctions. A Walrasian auction or Walrasian tâtonnement

6408-489: The rising prices, with a subsequantial sealed bid auction, in which bidders submit sealed package bids. The auctioneer uses the final bids to compute the best value allocation and the Vickrey payments. Generalized first-price auctions and Generalized second-price auctions offer slots for multiple bidders instead of making a single deal. The bidders get the slots according to the ranking of their bids. The second-price ruling

6497-464: The rough gem, figuring as seven pear shapes, four emerald cuts, thirteen round brilliants and one heart shape. The finished gems total 224 carats (44.8 g). The Lesotho Brown (usually simply called the Lesotho) at 601 carats (120 g) was the largest diamond previously found at the mine. This gemology article is a stub . You can help Misplaced Pages by expanding it . Auction An auction

6586-458: The sales lasting for months. One of the most significant historical auctions was in 193 AD, when the entire Roman Empire was put on the auction block by the Praetorian Guard . On 28 March 193, the Praetorian Guard first killed emperor Pertinax , then offered the empire to the highest bidder. Didius Julianus won the auction at the price of 6,250 drachmas per guard, an act that initiated

6675-407: The seller reserves the right to accept or reject the highest bid. In these cases, a set 'reserve' price known to the auctioneer, but not necessarily to the bidders, may have been set, below which the item may not be sold. If the seller announces to the bidders the reserve price, it is a public reserve price auction. In contrast, if the seller does not announce the reserve price before the sale, it

6764-472: The seller than a no-reserve auction as they are not required to accept a low bid, but this could result in a lower final price if less interest is generated in the sale. An all-pay auction is an auction in which all bidders must pay their bids regardless of whether they win. The highest bidder wins the item. All-pay auctions are primarily of academic interest, and may be used to model lobbying or bribery (bids are political contributions) or competitions such as

6853-497: The throne after buying it from the Praetorian Guard , who had assassinated his predecessor Pertinax. A civil war ensued in which three rival generals laid claim to the imperial throne. Septimius Severus , commander of the legions in Pannonia and the nearest of the generals to Rome, marched on the capital, gathering support along the way and routing cohorts of the Praetorian Guard Julianus sent to meet him. Abandoned by

6942-467: The throne, then offered 25,000. The guards closed with the offer of Julianus, threw open the gates, and proclaimed him emperor. Threatened by the military, the Senate also declared him emperor. His wife and his daughter both received the title Augusta. Upon his accession, Julianus immediately reversed Pertinax's monetary reforms by devaluing the Roman currency . Pertinax had increased the silver content of

7031-466: The throne. The remnants of the Praetorian Guard received pardons from Severus in exchange for surrendering the actual murderers of Pertinax. After seizing the ringleaders and killing them, the soldiers reported what they had done to Marcus Silius Messala , the consul, who summoned the senate to inform them of the proceedings. The Senate passed a motion proclaiming Severus emperor, awarded divine honours to Pertinax, and sentenced Julianus to death. Julianus

7120-518: The twenty-first century as house prices sky-rocketed . The rapidly rising housing market saw many homes, especially in Victoria and New South Wales, selling for significantly more than both the vendors' reserve price and the advertised price range. Subsequently, the auction systems' lack of transparency about the value of the property was brought into question, with estate agents and their vendor clients being accused of "under-quoting". Significant attention

7209-469: The two biggest auction houses were $ 5 billion ( Christie's ) and $ 4 billion ( Sotheby's ). Auctions come in a variety of types and categories, which are sometimes not mutually exclusive. Typification of auctions is considered to be a part of Auction theory . The economists Paul Milgrom and Robert B. Wilson were awarded the 2020 Nobel Prize for the introduction of new auction types (or formats). Auction types share features, which can be summarized into

7298-430: The two largest cities, Melbourne and Sydney . This was largely due to the fact that in a private sale the vendor has disclosed the price that they want, and potential purchasers would attempt to low-ball the price, whereas in an auction purchasers do not know what the vendor wants, and thus need to keep lifting the price until the reserve price is reached. The method has been the subject of increased controversy during

7387-444: The winner. The top two bidders must pay their full final bid amounts, and only the highest wins the auction. The intent is to make the high bidders bid above their upper limits. In the final rounds of bidding, when the current losing party has hit their maximum bid, they are encouraged to bid over their maximum (seen as a small loss) to avoid losing their maximum bid with no return (a very large loss). Another variation of all-pay auction,

7476-431: The winners will be Bidders B & D while Bidder A misses out because the combined bids of Bidders B & D is higher ($ 60) than for Bidders A and C ($ 55). Deferred-acceptance auction is a special case of a combinatorial auction. Another special case of a combinatorial auction is the combinatorial clock auction (CCA), which combines a clock auction, during which bidders may provide their confirmations in response to

7565-841: The world's second-largest auction house, was founded in London on 11 March 1744, when Samuel Baker presided over the disposal of "several hundred scarce and valuable" books from the library of an acquaintance. Christie's , now the world's largest auction house, was founded by James Christie in 1766 in London and published its first auction catalog that year, although newspaper advertisements of Christie's sales dating from 1759 have been found. Other early auction houses that are still in operation include Göteborgs Auktionsverk (1681), Dorotheum (1707), Uppsala auktionskammare (1731), Mallams (1788), Bonhams (1793), Phillips de Pury & Company (1796), Freeman's (1805) and Lyon & Turnbull (1826). By

7654-416: Was 29 January, the year was 133 according to Cassius Dio and 137 by the less reliable Historia Augusta . Didius Julianus was raised by Domitia Calvilla , mother of the emperor Marcus Aurelius . With Domitia's help, he was appointed at a very early age to the vigintivirate , the first step towards public distinction. He married a Roman woman named Manlia Scantilla , and sometime around 153, they had

7743-424: Was deserted by all except one of the prefects and his son-in-law, Cornelius Repentinus . Julianus was killed in the palace by a soldier on 2 June 193 AD, after a mere 66 days of ruling. According to the contemporary Roman historian Cassius Dio , Julianus' last words were: "But what evil have I done? Whom have I killed?" His body was given to his wife and daughter, who buried it in his great-grandfather's tomb by

7832-538: Was given to the matter by the Australian media, with the government in Victoria eventually bowing to pressure and implementing changes to legislation in an effort to increase transparency. In the UK, historically, auction houses were perceived to sell properties which may have been repossessed —  where a home owner fails to make regular mortgage payments —  or were probate sales (  i.e. ,  

7921-516: Was previously practical. In the 1990s, the multi-attribute auction was invented to negotiate extensive conditions of construction and electricity contracts via auction. Also during this time, OnSale.com developed the Yankee auction as its trademark. In the early 2000s, the Brazilian auction was invented as a new type of auction to trade gas through electronic auctions for Linde plc in Brazil . With

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