The literature of private provision of public goods suggests thatincentive to contribute is inversely related to group size. This paperempirically tests this relationship using field data from ChineseWikipedia, an online encyclopedia. We exploit an exogenous reduction ingroup size as a result of...

We analyze the optimal strategy of a high-quality incumbent that faces alow-quality ad-sponsored competitor. In addition to competing throughadjustments of tactical variables such as price or advertisingintensity, we allow the incumbent to consider changes in its businessmodel. We consider four...

Theories of multi-sided markets suggest that a platform's pricingstrategies on different sides of the market are closely linked, and inparticular, an increase in competition on one side may lead to anincrease in price on other sides. We empirically examine platforms'pricing strategies by...