Local peer effects and corporate investment

We examine peer effects in corporate finance by assessing how a firm's investment influences its neighboring peer firms' investment. To uncover the exogenous com- ponent of investment, we exploit time variation in the increases in state corporate income taxes across the United States and utilize heterogeneity in local peer firms' exposure to these tax increases to construct an instrumental variable. We identify a positive and robust causal effect of local peer firms' investment decisions on firm investment. Distinguishing between physical and intangible investment, we find that peer firms' investment in physical (intangible) capital only influences firm investment in the same type of capital, particularly when that capital is central to operations. Further evidence indicates that learning from peers is an important factor, as peer effects are more pronounced for firms with stronger learning motives.