Since the late 1990s, U.S. industries have experienced an increase in concentration levels. In this paper, we try to understand the drivers of this trend by asking whether this phenomenon has been echoed in Canada – a large and developed economy with geographic proximity and economic ties to...

Research on differentiated products markets often uses structural demand/supply models to identify firms’ marginal costs as product-level cost data is unavailable. Using unique demand and cost data from the cable TV industry, this paper evaluates a differentiated products model’s ability to...