Implement IV 2SLS basic code #9

Job	Run time
call-workflow / get-branches	6s
call-workflow / build-books (3-awesome-causal-inference-pythonmainatepropensity_score_and_dml)	1m 25s
call-workflow / build-books (14-awesome-causal-inference-pythonmainateiv)	1m 14s
call-workflow / build-books (10-awesome-causal-inference-pythonmainatesdid)	1m 12s
call-workflow / build-books (9-awesome-causal-inference-pythonmainatesc)	1m 11s
call-workflow / build-books (main)	1m 12s
call-workflow / deploy-books	47s
call-workflow / summarize	3s
	7m 10s

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