ebaycoins: ebay coins auctions

ebaycoinsR Documentation

ebay coins auctions

Description

The dataset contains the final price and number of bidders in 1000 eBay auctions of collectors coins (U.S. proof sets, i.e. specially packaged collectors’ coins sold by the U.S. Mint) along with several auction-specific features carefully collected by a human by visual inspection of text and images. The data was collected for auctions in the time periods Nov 7 - Dec 19, 2007 and Dec 27, 2007 - Jan 22, 2008.

Usage

ebaycoins

Format

A data frame with 1000 rows and 10 variables:

BookVal

The recommended value of the coin as reported by the Internet coin seller Golden Eagle Coins at https://www.goldeneaglecoin.com/

MinorBlem

Binary, coded as 1 if the proof set had minor damage on the box or packaging according to a subjective assessment of the item using the seller’s description and pictures of the auctioned object.

MajorBlem

Binary, coded as 1 if at least one coin was missing in the package or if other major imperfections were present.

PowerSeller

Binary, coded as 1 if the seller is ranked among the most successful sellers in terms of product sales and customer satisfaction on eBay.

IDSeller

Binary, coded as 1 if the seller’s identity has been established by cross-checking his contact information in consumer and business databases.

Sealed

Binary, coded as 1 if the proof set is sealed in its original envelope.

NegFeedback

Binary, coded as 1 if more than 1% of the seller’s feedback scores from buyers have been negative.

ReservePriceFrac

The seller’s reservation price (lowest accepted sale price + shipping cost) as a fraction of the object’s book value (BookVal).

NBidders

Counts. Number of bidders in the auction.

FinalPrice

Final price of the auctioned coin including shipping costs. NaN if the item was not sold.

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Source

Wegmann, B. and Villani, M. (2011). Bayesian Inference in Structural Second-Price Common Value Auctions, Journal of Business and Economic Statistics. https://doi.org/10.1198/jbes.2011.08289


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