Abstract In this article, I study the effect of entry and ownership structure on product variety within a city. Using longitudinal data on theaters in Korea, I find that the positive effect of entry on city-wide movie variety is limited only to the first few entrants. This finding, together with the observation that movie variety in a theater does not respond to entry, suggests that a theater's incentive to soften price competition by screening less popular movies not otherwise available in the city decreases as more theaters enter. I also find evidence that movie variety is greater in more concentrated cities, implying that a chain that owns multiple theaters in a city may differentiate the movie lineup offered in each theater more than when the theaters are individually owned in order to avoid cannibalization or to preempt entry.

中文翻译：

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电影综艺与城市

摘要 在本文中，我研究了进入和所有制结构对城市内产品多样性的影响。使用韩国影院的纵向数据，我发现进入对全市电影多样性的积极影响仅限于前几个进入者。这一发现，连同影院中的电影多样性对进入没有反应的观察结果表明，随着更多影院进入，影院通过放映在城市中不可用的不太受欢迎的电影来缓和价格竞争的动机会减弱。我还发现证据表明，在更集中的城市中，电影种类更多，这意味着在一个城市拥有多个影院的连锁店可能比单独拥有影院时更区分每个影院提供的电影阵容，以避免蚕食或抢占入口。