Chart 4
Marginal effects of tariff changes on exit by age

Note(s):  As a result of the skewed distribution of plants in terms of productivity and employment (many small and less productive plants and a few larger and very productive plants), the plots include only plants whose relative productivity and relative employment is within two standard deviations from their industry mean. This covers 98% of plants for Figures 2, and 97% of plants for 3. Figure 4 includes all plants. All variables are measured as deviations from two-digit industry means. For example, relative productivity has a mean value of one; for a plant whose productivity is twice as much as the industry average, its relative productivity is two, and its deviation from the mean of relative productivity is one. Marginal effects are evaluated at industry mean values.