BJ Data Tech Solution

Specialized on Data processing, Data management Implementation plan, Data Collection tools - electronic and paper base, Data cleaning specifications, Data extraction, Data transformation, Data load, Analytical Datasets, and Data analysis. BJ Data Tech Solutions teaches on design and developing Electronic Data Collection Tools using CSPro, and STATA commands for data manipulation. Setting up Data Management systems using modern data technologies such as Relational Databases, C#, PHP and Android.

stata code: participating more than once
stata code: participating more than once

Hi everyone,

Which stata code can I use if I want to keep those who have participated in one or more waves?
For example, a datesate like this: How can I choose those who have participate in more than once after 2000 (1)?
(My dataset is bigger, but I just want to show an example)

id 2000 2005 2010 2015
1 1 1 1 0
2 1 1 0 1
3 1 0 0 0
4 1 0 1 0
5 1 1 1 1
6 1 1 1 0

-Kate

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