International business researchers commonly estimate proportions, percentages, rates, or fractions – so-called “proportional dependent variables”. In this paper, we posit that two regression strategies are particularly pertinent to the international business field: Tobit and fractional regression. Reviewing recent international business research, we find that, while fractional regression is rarely used, analyses from Tobit regression are often incomplete or erroneously interpreted with consequences for the validity of the reported results. Accordingly, we clarify how researchers should choose between Tobit and fractional regression and interpret their results. We present insights based on simple simulations and data examples with associated Stata code and a decision tree for choosing between types of models for use with proportional dependent variables.

Reexamining CEO personality traits from a real options theory perspective, we suggest that the firm's strategic flexibility can be worsened by CEO conscientiousness and neuroticism. We use a measure of strategic flexibility as the firm's ability to take advantage of heightened volatility, which then results in superior stock returns. Our results suggest that strategic adaptability is impeded by rigid planning, resistance to change (conscientiousness) and lack of emotional stability (neuroticism). For firms that experience a decrease in volatility, the opposite holds. In line with trait activation theory, our results imply that the effect of specific CEO personality traits on firm dynamics and performance is contingent and context-specific. Our findings are economically significant and have important implications concerning CEO selection and management.