Consider the estimated export performance model in Table 11.1 (model 4). EXP18 is measured as a percentage (mean = 38.0%), while AGE is measured in years (mean = 31 years).
a. What will be the estimated coefficient of AGE if the variable is measured in months (i.e. mean = 372)? What will happen to its statistical significance?
b. What will be the estimated coefficient of AGE if EXP18 is measured as a fraction (i.e. mean = 0.38)? What will happen to its statistical significance?
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