We introduce a new statistic, 'spectral goodness of fit' (SGOF) to measure how well a network model explains the structure of an observed network. SGOF provides an absolute measure of fit, analogous to the standard R-squared in linear regression. Additionally, as it takes advantage of the...

By lowering search costs, making more products available, and providing access to free content, information technology (IT) has changed patterns of market concentration in media industries such as recorded music. In this paper, I argue that to understand how IT has changed media markets we need...

Given that tastes differ in different markets, how do producers in one market begin to export to other markets? Is it better to be insulated from or influenced by products from outside? I seek an answer to this question by modeling international trade in music recordings as a macroscopic...