WebSorted by: 2 If I understand correctly, this should work. Compute the products in a first step (conditional on the year) and the sums in a second step. As other answers already note, there's a difference between the if qualifier and the if programming command. WebOct 3, 2015 · You can run the regression by industry and year with the commands below. The example assumes that the name of the variable with the industry code is indcode. The table in your last post shows variable labels, not variable names. Code: bysort indcode …
Match by firm, year, industry, state, and size - CSDN博客
WebMay 18, 2011 · Asked 11 years, 11 months ago. Modified 4 years, 10 months ago. Viewed 32k times 6 I have some data in Stata which look like the first two columns of: group_id var_to_rank desired_rank _____ 1 10 1 1 20 2 1 30 3 1 40 4 2 10 1 2 20 2 2 20 2 2 30 3 ... bysort group_id: egen desired_rank=rank(var_to_rank) Share. Improve this answer. Follow WebHow to group data in STATA with SORT and BY Lucas Reis 1.28K subscribers 30K views 3 years ago Course: STATA for Complete Beginners 100% Free. Categorical Variables in Stata How to Sort in... dijkstra's algorithm java queue file input
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Web在 Stata 中如何分年度计算一个行业当中排名前四位的公司的总收入占整个行业的收入比重？. Note： 如果是算一般的赫芬达尔指数，可以使用连玉君老师编写的 hhi5 命令，很便捷 … WebApr 7, 2024 · Matching process, match year by year. use ep a_b 4 _match.dta,clear. // Define treat: a firm ever experienced a closure in any of plants; add treat of hq in the original sample. // Remove hq state if the state has no treat. replac e c_year =. if c_year ==0. bys hq: egen t_ close=count (treat) drop i f t_ close==0. drop t _ close. WebCounting with by. Using _n and _N in conjunction with the by command can produce some very useful results. Of course, to use the by command we must first sort our data on the by variable. sort group score by group: generate n1 = _n by group: generate n2 = _N list score group id nt n1 n2 1. 72 1 1 7 1 4 2. 76 1 3 7 2 4 3. 85 1 7 7 3 4 4. 90 1 6 ... beau\u0027s k0