Agglomeration, product heterogeneity and firm entry
利用美国酒店数据，研究了产品异质性与地理集聚的相互作用，发现酒店在集聚时对区域内其他酒店的构成和规模分布敏感，竞争与集聚效应在不同差异化企业间强度不同。
This paper investigates the interaction between product heterogeneity and geographic agglomeration. Using data for nearly the entire population of U.S. hotels, we examine patterns of entry into different regions among establishments delineated by product segment. We find that to the extent that hotels agglomerate, they are sensitive to the composition and size distribution of other hotels in an area. Our results are consistent with countervailing competition and agglomeration effects that vary in strength across differentiated firms.