stata - 在Stata中产生年度观察之间的百分比变化？

如何使用 gen 或 egen 命令生成 Stata 中不同年份观测值之间的百分比变化？例如，我有 1990 年到 2010 年的观测值，每个观测值都有不同的支出值，我试图生成一个新的观测值，其中包含 1990-1991、1991-1992 等的百分比变化。

最佳答案

//这是另一个衡量增长的例子:

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。

//如果您的数据格式良好，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

关于stata - 在Stata中产生年度观察之间的百分比变化？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/10254082/