LOCAL POLITICS AND ECONOMIC GEOGRAPHY: INFORMATION AGGREGATION AND POLARIZATION
研究了选民流动和分类如何影响全国与地方选举中的信息聚合，发现贸易成本高时经济集聚带来政治信息完全等价，自由贸易下选民按政治偏好分类导致地方极化。
ABSTRACT We consider information aggregation in national and local elections when voters are mobile and might sort themselves into local districts. Using a standard model of private information for voters in elections in combination with a new economic geography model, agglomeration occurs for economic reasons, whereas voter stratification occurs due to political preferences. When trade is more costly, people tend to agglomerate for economic reasons, resulting in full information equivalence in the political sector. Under free trade, people sort themselves into districts, most of which are polarized, resulting in no full information equivalence in these districts.