Predicting Values (Regression)

Using the maize only version of eth_allrounds_final.dta with per hectare inputs compute and graph predicted values from a regression.

• Run reg yield_kg fert labor i.irr i.admin_1
• Use predict yhat to generate predicted values
• Use summ yield_kg yhat, meanonly to find the plotting range
• Save the minimum and maximum values for yhat AND yield_kgas locals, for example:

	qui sum			yhat, meanonly
	local			yhat_min = r(min)
	local			yhat_max = r(max)

• Create locals called gmin and gmax that are the minimum and maximum of yhat and yield_kg. For example, gmin = min(yhat_min’, yield_min')
• Use twoway scatter to create the scatter plot
• Add the 45° reference line with function y = x and use the locals in the range option function y = x, range(gmin' gmax')