Government Prediction Markets: Why, Who, and How
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Using Prediction Markets to Estimate the Reproducibility of Scientific
Using prediction markets to estimate the SEE COMMENTARY reproducibility of scientific research Anna Drebera,1,2, Thomas Pfeifferb,c,1, Johan Almenbergd, Siri Isakssona, Brad Wilsone, Yiling Chenf, Brian A. Nosekg,h, and Magnus Johannessona aDepartment of Economics, Stockholm School of Economics, SE-113 83 Stockholm, Sweden; bNew Zealand Institute for Advanced Study, Massey University, Auckland 0745, New Zealand; cWissenschaftskolleg zu Berlin–Institute for Advanced Study, D-14193 Berlin, Germany; dSveriges Riksbank, SE-103 37 Stockholm, Sweden; eConsensus Point, Nashville, TN 37203; fJohn A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138; gDepartment of Psychology, University of Virginia, Charlottesville, VA 22904; and hCenter for Open Science, Charlottesville, VA 22903 Edited by Kenneth W. Wachter, University of California, Berkeley, CA, and approved October 6, 2015 (received for review August 17, 2015) Concerns about a lack of reproducibility of statistically significant (14). This problem is exacerbated by publication bias in favor of results have recently been raised in many fields, and it has been speculative findings and against null results (4, 16–19). argued that this lack comes at substantial economic costs. We here Apart from rigorous replication of published studies, which is report the results from prediction markets set up to quantify the often perceived as unattractive and therefore rarely done, there reproducibility of 44 studies published in prominent psychology are no formal mechanisms to identify irreproducible findings. journals and replicated in the Reproducibility Project: Psychology. Thus, it is typically left to the judgment of individual researchers The prediction markets predict the outcomes of the replications to assess the credibility of published results. -
June 1St, 2010 Mr. Gary Gensler Chairman Commodity Futures
30 Alice Lane Smithtown, NY 11787 June 1st, 2010 Mr. Gary Gensler Chairman Commodity Futures Trading Commission Three Lafayette Centre 1155 21st Street, NW Washington, DC 20581 Dear Chairman Gensler, My name is Bill Bonfanti and I own and operate a movie based website, FilmGo.net and I fully support the trading of box office futures. Let me give you a little history as to who I am and what I do. I was a stockbroker on the floor of the New York Stock Exchange for 13 years and as such I understand the volatility associated with trading stocks and other financial instruments. I currently serve as box office analyst and film reviewer for the site. One of the main arguments presented by the MPAA in opposition to trading box office receipts is that box office futures would begin to negatively impact the actual box office receipts of their underlying films due to possible negative buzz associated with the price of a contract. This is a complete falsehood and in fact the opposite is true. If anything, a box office futures exchange will increase interest and public appetite for films. If you look at any newsstand, you’ll see that most of the magazines on the rack cater to our obsession with movies, TV and celebrities. There are numerous websites and televisions shows that also cater to this obsession. All of these spread both negative and positive buzz about films from the second a project is announced to the time it is actually playing in theatres nationwide. Critics review films every week and even their esteemed opinions don’t have any overall effect on the box office. -
How the CFTC Is Using Virtual Currencies to Expand Its Jurisdiction
Arkansas Law Review Volume 73 Number 2 Article 1 August 2020 New Things Under the Sun: How the CFTC is Using Virtual Currencies to Expand Its Jurisdiction James Michael Blakemore University of Michigan Law School Follow this and additional works at: https://scholarworks.uark.edu/alr Part of the Banking and Finance Law Commons, Law and Economics Commons, Secured Transactions Commons, and the Securities Law Commons Recommended Citation James M. Blakemore, New Things Under the Sun: How the CFTC is Using Virtual Currencies to Expand Its Jurisdiction, 73 Ark. L. Rev. 205 (2020). Available at: https://scholarworks.uark.edu/alr/vol73/iss2/1 This Article is brought to you for free and open access by ScholarWorks@UARK. It has been accepted for inclusion in Arkansas Law Review by an authorized editor of ScholarWorks@UARK. For more information, please contact [email protected]. NEW THINGS UNDER THE SUN: HOW THE CFTC IS USING VIRTUAL CURRENCIES TO EXPAND ITS JURISDICTION James Michael Blakemore* INTRODUCTION A decade has passed since Bitcoin solved a fundamental problem plaguing virtual currencies:1 How to ensure, without re- sort to financial intermediaries or other trusted central authorities, that a unit of digital currency can be spent only once.2 In that * Partner at Ketsal PLLC. Adjunct Professor, University of Michigan Law School. For thoughtful comments and conversations, I would like to thank Connie Chang, Joshua Garcia, Zachary Fallon, Diego Zambrano, Pandora Chang, participants in the Arkansas Law Review Symposium on the Evolving Regulation of Crypto, and the editors of the Arkansas Law Re- view. The views expressed here are my own and do not necessarily reflect the views of Ketsal. -
Crowds, Lending, Machine, and Bias
Crowds, Lending, Machine, and Bias Runshan Fu Yan Huang Param Vir Singh Heinz College, Tepper School of Business, Tepper School of Business, Carnegie Mellon University Carnegie Mellon University Carnegie Mellon University [email protected] [email protected] [email protected] Abstract Big data and machine learning (ML) algorithms are key drivers of many fintech innovations. While it may be obvious that replacing humans with machines would increase efficiency, it is not clear whether and where machines can make better decisions than humans. We answer this question in the context of crowd lending, where decisions are traditionally made by a crowd of investors. Using data from Prosper.com, we show that a reasonably sophisticated ML algorithm predicts listing default probability more accurately than crowd investors. The dominance of the machine over the crowd is more pronounced for highly risky listings. We then use the machine to make investment decisions, and find that the machine benefits not only the lenders but also the borrowers. When machine prediction is used to select loans, it leads to a higher rate of return for investors and more funding opportunities for borrowers with few alternative funding options. We also find suggestive evidence that the machine is biased in gender and race even when it does not use gender and race information as input. We propose a general and effective “debiasing” method that can be applied to any prediction focused ML applications, and demonstrate its use in our context. We show that the debiased ML algorithm, which suffers from lower prediction accuracy, still leads to better investment decisions compared with the crowd. -
Incentives in Computer Science Lecture #18: Prediction Markets∗
CS269I: Incentives in Computer Science Lecture #18: Prediction Markets∗ Tim Roughgardeny November 30, 2016 1 Markets for Information 1.1 Uncertain Events Suppose we're interested in an uncertain event, such as whether or not the Warriors will win the 2017 NBA Championship, whether or not the winner of the next Presidential election will be a Republican or a Democrat, or whether or not 2017 will be the hottest year on record. Each of these events is uncertain, but eventually we will know whether or not they occurred. That is, the outcomes of these uncertain events are eventually verifiable. (Similar to the setup for scoring rules in the first half of last lecture, but different from the setup for eliciting subjective opinions in the second half.) What's the best way to predict whether or not such events will happen? For example, suppose you had to predict the winner of a sporting match, despite knowing very little about the sport. You could do a lot worse than turning to the betting markets in Vegas for help. Vegas odds don't let you predict anything with anything close to full certainty, but even the best experts struggle to outperform betting markets with any consistency. For example, favorites cover the Vegas spread about 50% of the time, while underdogs beat the spread about 50% of the time. 1.2 The Iowa Electronic Markets If betting markets work so well for forecasting the outcomes of sporting events, why not use them to also predict other kinds of uncertain events? This is exactly the idea behind the Iowa Electronic Markets (IEM), which have operated since 1988 with the goal of using markets to forecast the outcome of presidential, congressional, and gubernatorial elections. -
Why Hollywood Isn't As Liberal As We Think and Why It Matters
Claremont Colleges Scholarship @ Claremont CMC Senior Theses CMC Student Scholarship 2019 Why Hollywood Isn't As Liberal As We Think nda Why It Matters Amanda Daily Claremont McKenna College Recommended Citation Daily, Amanda, "Why Hollywood Isn't As Liberal As We Think nda Why It Matters" (2019). CMC Senior Theses. 2230. https://scholarship.claremont.edu/cmc_theses/2230 This Open Access Senior Thesis is brought to you by Scholarship@Claremont. It has been accepted for inclusion in this collection by an authorized administrator. For more information, please contact [email protected]. 1 Claremont McKenna College Why Hollywood Isn’t As Liberal As We Think And Why It Matters Submitted to Professor Jon Shields by Amanda Daily for Senior Thesis Fall 2018 and Spring 2019 April 29, 2019 2 3 Abstract Hollywood has long had a reputation as a liberal institution. Especially in 2019, it is viewed as a highly polarized sector of society sometimes hostile to those on the right side of the aisle. But just because the majority of those who work in Hollywood are liberal, that doesn’t necessarily mean our entertainment follows suit. I argue in my thesis that entertainment in Hollywood is far less partisan than people think it is and moreover, that our entertainment represents plenty of conservative themes and ideas. In doing so, I look at a combination of markets and artistic demands that restrain the politics of those in the entertainment industry and even create space for more conservative productions. Although normally art and markets are thought to be in tension with one another, in this case, they conspire to make our entertainment less one-sided politically. -
Crowdsourced Outcome Determination in Prediction Markets
Crowdsourced Outcome Determination in Prediction Markets Rupert Freeman Sebastien´ Lahaie David M. Pennock Duke University Microsoft Research Microsoft Research [email protected] [email protected] [email protected] Abstract to their own stake in the market; this is known as outcome manipulation (Shi, Conitzer, and Guo 2009; Berg and Ri- A prediction market is a useful means of aggregating infor- etz 2006; Chakraborty and Das 2016). Additionally, by al- mation about a future event. To function, the market needs a trusted entity who will verify the true outcome in the end. lowing anyone to create a market, there is no longer any Motivated by the recent introduction of decentralized pre- guarantee that all questions will be sensible, or even have diction markets, we introduce a mechanism that allows for a well-defined outcome. In this paper, we propose a specific the outcome to be determined by the votes of a group of ar- prediction market mechanism with crowdsourced outcome biters who may themselves hold stakes in the market. Despite determination that addresses several challenges faced by de- the potential conflict of interest, we derive conditions under centralized markets of this sort. which we can incentivize arbiters to vote truthfully by us- ing funds raised from market fees to implement a peer pre- First is the issue of outcome ambiguity. At the time the diction mechanism. Finally, we investigate what parameter market closes, it might be unreasonable to assign a binary values could be used in a real-world implementation of our value to the event outcome due to lack of clarity in the out- mechanism. -
Fantasyscotus: Crowdsourcing a Prediction Market for the Supreme Court Josh Blackman Harlan Institute
Northwestern Journal of Technology and Intellectual Property Volume 10 | Issue 3 Article 3 Winter 2012 FantasySCOTUS: Crowdsourcing a Prediction Market for the Supreme Court Josh Blackman Harlan Institute Adam Aft Corey Carpenter Recommended Citation Josh Blackman, Adam Aft, and Corey Carpenter, FantasySCOTUS: Crowdsourcing a Prediction Market for the Supreme Court, 10 Nw. J. Tech. & Intell. Prop. 125 (2012). https://scholarlycommons.law.northwestern.edu/njtip/vol10/iss3/3 This Article is brought to you for free and open access by Northwestern Pritzker School of Law Scholarly Commons. It has been accepted for inclusion in Northwestern Journal of Technology and Intellectual Property by an authorized editor of Northwestern Pritzker School of Law Scholarly Commons. NORTHWESTERN JOURNAL OF TECHNOLOGY AND INTELLECTUAL PROPERTY FantasySCOTUS Crowdsourcing a Prediction Market for the Supreme Court Josh Blackman, Adam Aft and Corey Carpenter January 2012 VOL. 10, NO. 3 © 2012 by Northwestern University School of Law Northwestern Journal of Technology and Intellectual Property Copyright 2012 by Northwestern University School of Law Volume 10, Number 3 (January 2012) Northwestern Journal of Technology and Intellectual Property Fantasy SCOTUS Crowdsourcing a Prediction Market for the Supreme Court By Josh Blackman,* Adam Aft** and Corey Carpenter*** The object of our study, then, is prediction, the prediction of the incidence of the public force through the instrumentality of the courts.1 -Oliver Wendell Holmes, Jr. It is tough to make predictions, especially about the future.2 -Yogi Berra I. INTRODUCTION ¶1 Every year the Supreme Court of the United States captivates the minds and curiosity of millions of Americans—yet the inner-workings of the Court are not fully transparent. -
A Critical Look at the Film Futures
BACK TO THE FUTURE[S]: A CRITICAL♦ LOOK AT THE FILM FUTURES BAN INTRODUCTION.................................................................................180 I. THE HISTORY OF FILM FUTURES: FROM INCEPTION TO ARMAGEDDON .....................................................................182 II. BACKGROUND AND DEFINITIONS......................................189 A. A Brief History of Futures Trading ................................189 B. Commodity Futures Trading, Generally.........................189 C. Film Futures, Specifically................................................191 D. Who Would Invest in Film Futures?...............................193 III. IRON [B]AN – WHY CONGRESS BANNED FILM FUTURES TRADING ...........................................................195 A. “Motion Picture Box Office Receipts are not a ‘Commodity’” .................................................................196 B. “Speculators will ‘Game’ the Futures Exchange”...........198 C. “Film Futures Trading is Just Legalized Gambling”.......201 D. “Film Futures Resemble the Risky Financial Instruments that Caused the Financial Crisis” .............202 IV. TO KILL A MOCKINGBIRD–WHY FILM FUTURES TRADING WOULD HELP, NOT HARM, THE MOTION PICTURE INDUSTRY...........................................................204 A. The CFTC’s Authority and the Significance of its Authorization of Film Futures Trading ........................204 1. The CFTC’s Authority...............................................204 2. The Failure of Congress’s Ban on the Trading of Onion -
Predicting the Outcome of an Election
Social Education 80(5), pp 260–262 ©2016 National Council for the Social Studies Predicting the Outcome of an Election Social Education staff Part of the excitement of the period immediately preceding an election lies in keep- a candidate by selling shares that were ing track of the different predictions. There are a variety of ways of predicting the bought at a lower price when the candi- winner of a presidential election, and it can be revealing to examine the accuracy date’s chances were rated low). of prediction systems after the election. Once their own money is at stake, people are considered likely to follow One predictive system with which as reflecting the collective wisdom of a their self-interest by being careful with readers of Social Education have wide range of people who are willing to their research and by examining a wide become familiar is the “Keys to the risk their own money on the outcome range of information. Although different White House” developed by historian of a contest. people will reach different conclusions Allan J. Lichtman and mathematician Prediction markets set odds for or and make different bets, the prediction Vladimir Keilis-Borok (see the previ- against each outcome, based on the way markets aggregate the range of available ous article). The thirteen Keys are of that participants choose to invest their information into a collective projection great interest for studying the success money. Participants can thus calculate of the likely result of the contest. or failure of presidential terms and the return they will receive for a suc- David Rothschild, an economist at the outcome of presidential elections. -
Prediction Markets As a Forecasting Tool
PREDICTION MARKETS AS A FORECASTING TOOL Daniel E. O’Leary ABSTRACT Internal prediction markets draw on the wisdom of crowds, gathering knowledge from a broad range of information sources and embedding that knowledge in the stock price. This chapter examines the use of internal prediction markets as a forecasting tool, including as a stand-alone, and as a supplement to forecasting tools. In addition, this chapter examines internal prediction market applications used in real-world settings and issues associated with the accuracy of internal prediction markets. INTRODUCTION Internal prediction markets are different than so-called naturally occurring markets, in that prediction markets are internal markets where generally virtual dollars are used as a basis to try and put prices on particular events or sets of events, for problems of direct relevance to a specific organization. These markets are designed to gather information from a broad range of users in the context of a market, where participants ‘‘bet’’ on the likelihood of potential future events using prices to, ultimately predicting the probability of the outcome of some event. Advances in Business and Management Forecasting, Volume 8, 169–184 Copyright r 2011 by Emerald Group Publishing Limited All rights of reproduction in any form reserved ISSN: 1477-4070/doi:10.1108/S1477-4070(2011)0000008014 169 170 DANIEL E. O’LEARY Prediction markets provide an information gathering and aggregation mechanism across the population of traders to generate a price on some stock, where that stock being traded typically is a prediction or forecast of some event. For example, a stock may be ‘‘the number of flaws in a product will be less than x.’’ Researchers (e.g., Berg, Nelson, & Rietz, 2008; Wolfers & Zitzewitz, 2004) have found that prediction markets provide accurate forecasts, sometimes better than sophisticated statistical tools. -
American Blockbuster Movies, Technology, and Wonder
MOVIES, TECHNOLOGY, AND WONDER MOVIES, TECHNOLOGY, charles r. acland AMERICAN BLOCKBUSTER SIGN, STORAGE, TRANSMISSION A series edited by Jonathan Sterne and Lisa Gitelman AMERICAN BLOCKBUSTER MOVIES, TECHNOLOGY, AND WONDER charles r. acland duke university press · Durham and London · 2020 © 2020 duke university press All rights reserved Printed in the United States of Amer i ca on acid- free paper ∞ Designed by Matthew Tauch Typeset in Whitman and Helvetica lt Standard by Westchester Publishing Ser vices Library of Congress Cataloging- in- Publication Data Names: Acland, Charles R., [date] author. Title: American blockbuster : movies, technology, and wonder / Charles R. Acland. Other titles: Sign, storage, transmission. Description: Durham : Duke University Press, 2020. | Series: Sign, storage, transmission | Includes bibliographical references and index. Identifiers: lccn 2019054728 (print) lccn 2019054729 (ebook) isbn 9781478008576 (hardcover) isbn 9781478009504 (paperback) isbn 9781478012160 (ebook) Subjects: lcsh: Cameron, James, 1954– | Blockbusters (Motion pictures)— United States—History and criticism. | Motion picture industry—United States— History—20th century. | Mass media and culture—United States. Classification:lcc pn1995.9.b598 a25 2020 (print) | lcc pn1995.9.b598 (ebook) | ddc 384/.80973—dc23 lc record available at https://lccn.loc.gov/2019054728 lc ebook record available at https://lccn.loc.gov/2019054729 Cover art: Photo by Rattanachai Singtrangarn / Alamy Stock Photo. FOR AVA, STELLA, AND HAIDEE A technological rationale is the rationale of domination itself. It is the coercive nature of society alienated from itself. Automobiles, bombs, and movies keep the whole thing together. — MAX HORKHEIMER AND THEODOR ADORNO, Dialectic of Enlightenment, 1944/1947 The bud get is the aesthetic. — JAMES SCHAMUS, 1991 (contents) Acknowl edgments ...........................................................