Clustered Standard Errors (Standard Errors)

Using the maize only version of eth_allrounds_final.dta with per hectare inputs, compare default and clustered standard errors.

• Run reg yield_kg fert labor i.irr i.admin_1, robust
• Run the same regression with clustered standard errors: , vce(cluster hhid)

1. How did the standard error on fert change when moving from robust to clustered?
2. Does clustering at the household level or plot-level make sense for this data?

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