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International Monetary Fund
Firm size follows Zipf's Law, a very fat-tailed distribution that implies a few large firms account for a disproportionate share of overall economic activity. This distribution of firm size is crucial for evaluating the welfare impact of macroeconomic policies such as barriers to entry or trade liberalization. Using a multi-country model of production and trade in which the parameters are calibrated to match the observed distribution of firm size, we show that the welfare impact of high entrydoi:10.1017/s0020818300022700 fatcat:hpxwiubjnnfarp5dal2b34yuia