Define a dummy variable for firms that export, i.e., firms with Xi >0, and estimate the appropriate regressions under the Cobb-Douglas framework to test the following hypothesis: a. Whether firms that export have a different total factor productivity, on average than non exporting firms in the given industry. Report your regression and test estimates using heteroskedasticity robust standard errors. Discuss whether your estimates can be given a causal interpretation with respect to the effect that exports have on firms productivity TTTT Paragraph Arlal WEET 3 (121) T' T T- St Mashup LESS 1 Define a dummy variable for firms that export, i.e., firms with Xi >0, and estimate the appropriate regressions under the Cobb-Douglas framework to test the following hypothesis: a. Whether firms that export have a different total factor productivity, on average than non exporting firms in the given industry. Report your regression and test estimates using heteroskedasticity robust standard errors. Discuss whether your estimates can be given a causal interpretation with respect to the effect that exports have on firms productivity TTTT Paragraph Arlal WEET 3 (121) T' T T- St Mashup LESS 1