Using Locals in Regressions (Macros)

In this exercise you will use local macros to store variable lists and reuse them in multiple regressions. For this week’s assignment we will use eth_allrounds_final.dta so start by loading that data set.

Create a local macro named controls that contains three plot- or household-level control variables:

• crop_shock (1 = experienced shock, 0 = no shock)
• irrigated (1 = irrigated, 0 = not irrigated)
• hh_asset_index (household asset index)

1. Use this macro to regress of yield_kg on nitrogen_kg and the controls stored in controls but only if the variable crop_name equals maize. What are the coefficients on each control that is statistically significant at the 90% level?

2. Now modify the macro definition so that the controls also include female_manager (1 = if the plot manager is female, 0 = if male). Re-run the regression without changing the regression lines themselves. What are the coefficients on each control that is statistically significant at the 90% level?

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