% ============================================================================
% UQO Working Paper Template — Economics / Finance
% ============================================================================
\documentclass[12pt,letterpaper]{article}

% --- Encoding & Language ---
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[english]{babel}

% --- Page Layout ---
\usepackage[
  letterpaper,
  top=1in,
  bottom=1in,
  left=1in,
  right=1in
]{geometry}

% --- Typography ---
\usepackage{mathptmx}          % Times-like font (text + math)
\usepackage{microtype}         % Improved typographic refinements
\usepackage{setspace}
\onehalfspacing                % 1.5 line spacing

% --- Math ---
\usepackage{amsmath,amssymb,amsthm}

% --- Theorem Environments ---
\newtheorem{proposition}{Proposition}
\newtheorem{definition}{Definition}
\newtheorem{hypothesis}{Hypothesis}

% --- Tables ---
\usepackage{booktabs}
\usepackage{tabularx}
\usepackage{multirow}
\usepackage{threeparttable}
\usepackage{siunitx}
\sisetup{
  input-symbols = {()},
  table-format  = -1.3,
  parse-numbers = false
}

% --- Figures ---
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{float}

% --- Colors & Links ---
\usepackage[dvipsnames]{xcolor}
\usepackage[
  colorlinks  = true,
  linkcolor   = NavyBlue,
  citecolor   = NavyBlue,
  urlcolor    = NavyBlue,
  breaklinks  = true
]{hyperref}

% --- Bibliography ---
\usepackage[authoryear,round,semicolon]{natbib}
\bibliographystyle{aer}

% --- Captions ---
\usepackage[
  font       = small,
  labelfont  = bf,
  labelsep   = period,
  justification = justified,
  singlelinecheck = false
]{caption}

% --- Headers & Footers ---
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\renewcommand{\headrulewidth}{0pt}
\fancyfoot[C]{\thepage}

% --- Section Formatting ---
\usepackage{titlesec}
\titleformat{\section}{\large\bfseries}{\thesection.}{0.5em}{}
\titleformat{\subsection}{\normalsize\bfseries}{\thesubsection.}{0.5em}{}
\titleformat{\subsubsection}{\normalsize\itshape}{\thesubsubsection.}{0.5em}{}

% --- Appendix Support ---
\usepackage[toc,page]{appendix}

% --- Algorithm Support ---
\usepackage[ruled,vlined,linesnumbered]{algorithm2e}

% --- Misc ---
\usepackage{enumitem}
\setlist{nosep,leftmargin=*}

% ============================================================================
% METADATA — Edit these fields for each working paper
% ============================================================================
\newcommand{\WPnumber}{8}
\newcommand{\WPtitle}{Prediction Markets as Arrow--Debreu Securities: Evidence from Polymarket}
\newcommand{\WPsubtitle}{Price Discovery, Market Completeness, and Information Aggregation in Blockchain-Based State-Contingent Claims}
\newcommand{\WPdate}{May 2026}
\newcommand{\WPversion}{1.0}
\newcommand{\WPabstract}{%
  This paper investigates whether blockchain-based prediction markets
  satisfy the theoretical properties of Arrow--Debreu complete markets.
  We model Polymarket binary outcome contracts as state-contingent
  claims and test for market completeness, no-arbitrage pricing,
  and information aggregation efficiency using Federal Reserve rate
  decision markets (five mutually exclusive outcomes forming a complete
  state space) and the 2024 U.S.\ Presidential Election market.
  Employing a comprehensive empirical framework---including event
  studies around FOMC and CPI announcements, Hasbrouck information
  shares, vector autoregression, Granger causality tests, and
  HAR-RV volatility models---we document three principal findings.
  First, state prices within Polymarket neg-risk groups sum
  to values close to unity, consistent with Arrow--Debreu completeness
  and the absence of persistent arbitrage.  Second, prediction market
  prices adjust to macroeconomic news releases 15--45 minutes ahead of
  corresponding moves in Treasury futures, implying a price discovery
  advantage in the state-contingent claims market.  Third, liquidity
  and microstructure quality, as measured by Roll spreads and Amihud
  illiquidity ratios, rival those of established financial markets for
  high-profile contracts.  These results establish that decentralized
  prediction markets can function as effective Arrow--Debreu economies
  and contribute to the literatures on state-contingent pricing,
  information aggregation, market microstructure, and blockchain finance.%
}
\newcommand{\WPkeywords}{Prediction markets, Arrow--Debreu securities, state-contingent claims, price discovery, market microstructure, blockchain finance, information aggregation}
\newcommand{\WPjel}{G13, G14, D47, D53, C58}

% --- Author ---
\newcommand{\WPauthor}{Simon-Pierre Boucher}
\newcommand{\WPaffiliation}{%
  Département des sciences administratives\\
  Université du Québec en Outaouais%
}
\newcommand{\WPemail}{simon-pierre.boucher@uqo.ca}
\newcommand{\WPaddress}{%
  Gatineau -- Pavillon Alexandre-Taché\\
  283, boulevard Alexandre-Taché\\
  Gatineau, Québec, Canada J9A 1L8%
}

% ============================================================================
% DOCUMENT
% ============================================================================
\begin{document}

% --- Title Page ---
\input{sections/titlepage}

% --- Main Body ---
\input{sections/introduction}
\input{sections/literature}
\input{sections/theoretical}
\input{sections/data}
\input{sections/methodology}
\input{sections/results}
\input{sections/robustness}
\input{sections/conclusion}

% --- References ---
\newpage
\bibliography{references}

% --- Appendix ---
\input{appendix/appendix}

\end{document}