Question

如何使用gen或egen命令生成Stata中不同年份的观察值之间的百分比变化？例如，我有1990年到2010年的观察结果，每个都有不同的支出价值，我试图用1990-1991,1991-1992等的百分比变化产生一个新的观察结果。

Answer 1

//这是另一个增长衡量标准的例子：

clear
set obs 100
gen year = _n + 1959
gen expenditure = _n^(1/3) + runiform()
line expenditure year, yti("Synthetic data example")

// From Statalist：

bys year: g expendituregrowth=100*(expenditure[_n]-expenditure[_n-1])/expenditure[_n-1]

//还：

gen expenditure_gr = (expenditure/expenditure[_n-1] - 1)*100 // growth rate for expenditure
gen expenditure_bl = 100*expenditure/expenditure[1] // baseline growth rate for expenditure; base 100 = 1960

line expenditure_gr year, yti("Growth rate")
line expenditure_bl year, yti("Growth rate (base 100 = 1960)")

// expenditure_gr的计算是我认为你正在寻找的。

//如果您的数据格式正确，请使用带有时间序列的Stata并轻松获得增长率：

tsset year, delta(1)
cap drop expenditure_gr
gen expenditure_gr = D.expenditure / 100*L.expenditure

在Stata的年度观察之间产生百分比变化？

1 个答案: