Testing for time-fixed effects 看看是否需要 时间固定效果,运行FE模型时使用 命令testparm 。 xtreg y x1 i.year, retestparm i.year 结果为: The Prob>F is > 0.05, so we failed to reject the null that the coefficients for all years are jointly equal to ...
Introduction to Time Series Using Stata, Revised Edition, by Sean Becketti, is a first-rate, example-based guide to time-series analysis and forecasting using Stata. This is a must-have resource for researchers and students learning to analyze time-series data and for anyone wanting to implemen...
time2str etod, generate(tod) etod (double)tod (string) .2548611106:06 .0444444401:03 .4236111110:09 .8979166721:33 .5215277812:31 .8409722220:11 .2104166705:02 .5638888913:31 .2645833306:20 .9472222222:44 Technical note To convert a string of format HH:MM:SS to an elapsed time the formula...
Stata's statistical features empower you to answer a wide range of research questions. From linear and logistic regression to time-series and panel-data analyses, survival models, causal inference, Bayesian analysis, and machine learning, you can fit models, evaluate assumptions, make inferences, an...
Introduction to Time Series Using Stata, Revised Edition, by Sean Becketti, is a practical guide to working with time-series data using Stata. In this book, Becketti introduces time-series techniques—from simple to complex—and explains how to implement them using Stata. The many worked exampl...
分别放入被解释变量（或因变量，此处为gdp）,解释变量（或自变量，即交互项treated*time），以及将地区和...
. . . . Change string variables to numeric [R] encode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Encode string into numeric and vice versa [R] generate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
From daily/monthly date variable to quarterly 1、Quarterly date from daily date 导入数据,查看数据 usedate.dtadesced 可以发现Date2 is a string date variable 然后进行转换 gen datevar=date(date2,"MDY", 2099)format datevar %tdgen quarterly = qofd(datevar)format quarterly %tq ...
in 1replace make = substr(make, 1, 6)compress24.用"trim"去掉字符串变量的前面和后面的空格:clear allinput str12 str"String A "" String B "" String C"endreplace str = trim(str)compress25.制作动画图表:sysuse uslifeexp, clearforv i = 1900/1999 {sc le_m le_f if year==i', ti(i...
控制组的样本权重。命令格式: compute_weights, treatedVar(string) /// eventTimeVar(string) /// groupID(string) /// sub(string treatedVar:处理变量,在给定数据子集中,个体是否作为处理组; eventTimeVar:处理时点 groupID:个体变量 subexpVar:每个事件时间变量 // Use compute_weights() to...