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Columns used here: inlf, 1 if the woman was in the labour force in 1975; lwage, log hourly wage (missing for women who did not work); wage, hourly wage; educ, years of schooling; exper, years of labour-market experience; expersq, exper squared; fatheduc, father's years of schooling; motheduc, mother's years of schooling; also hours, kidslt6, kidsge6, age, repwage, hushrs, husage, huseduc, huswage, faminc, mtr, unem, city, nwifeinc and rownames.","file_sha256":"bcfc04b6a87746b185ed972f1149c459cc1af5a6ff44443ce5dd004eb8204a78","format":"csv","frame_sha256":null,"generator":null,"kind":"file","licence":"GPL-3 (R package wooldridge); fetched, not redistributed.","member":null,"object":null,"params":{},"path":null,"read_kw":{},"records":null,"role":"agent","sha256":"bcfc04b6a87746b185ed972f1149c459cc1af5a6ff44443ce5dd004eb8204a78","transforms":[],"url":"https://raw.githubusercontent.com/vincentarelbundock/Rdatasets/1dcc2bf5f955cc1224a3e1307256e1fe86b68dae/csv/wooldridge/mroz.csv"}},"difficulty":"E","id":"paper_repro.mroz_1987.ex15_1.agent","level":"T2","meta":{"acceptable_tools":["infer.iv_2sls"],"answer_format":{"figure_transform":"identity","round_to":null,"unit_scale":1.0},"cluster":"mroz_1987","contamination":{"benchmark_first_public":"2020-01","gold_in_public_repo":true,"model_reported_cutoff":null,"url":"https://www.cengage.com/c/introductory-econometrics-a-modern-approach-7e-wooldridge/9781337558860/"},"expected_tool":"infer.iv_2sls","family":"iv","headline_keys":{"infer.iv_2sls":["coef.educ"]},"kind":"agent","known_deviation":null,"locator":"Wooldridge (2020), Example 15.1 'Estimating the Return to Education for Married Women', equation (15.17), coefficient on educ","n_published":428,"paper":"mroz_1987","question_states":[],"reference":{"cite":1,"steps":[{"args":{"dataset":"mroz","endog":["educ"],"exog":[],"instruments":["fatheduc"],"se":"classical","subset":"inlf == 1","y":"lwage"},"tool":"infer.iv_2sls","why":"Example 15.1, equation (15.17): simple IV regression of the log wage on education, with father's education as the instrument, for the working women."}]},"se_policy":{"basis":"The textbook's usual IV standard errors (Section 15-1 and the note in Example 15.4: a degrees-of-freedom adjustment in the error variance).","convention":"classical (homoskedastic), n - k","never_required":false,"stated_in_question":false},"target":"ex15_1","trap_tools":[]},"question":"Wooldridge, Introductory Econometrics (7th edition), Example 15.1, equation (15.17), using Mroz's (1987) data on married women: among the women who worked in 1975 (those with an observed wage), estimate by instrumental variables the return to education in a simple regression of the log hourly wage on years of schooling and an intercept, using the father's years of schooling as the instrument. Report the coefficient on years of schooling.","requires":[],"runner":null,"sources":["mroz_1987.ex15_1.paper","mroz_1987.ex15_1.software"],"split":"public","suite":"paper_repro","tags":["paper_repro","mroz_1987","iv"],"target":"agent","tool":null,"truth":"Wooldridge, J. M. (2020). Introductory Econometrics: A Modern Approach, 7th edition. Boston: Cengage. Examples 15.1 and 15.5 (Mroz 1987, 'The Sensitivity of an Empirical Model of Married Women's Hours of Work', data set MROZ). Examples 15.1 and 15.5 are long-standing examples of the book (earlier editions not read), so 'published' (the edition read) understates how long the cells have been public. Wooldridge (2020), Example 15.1 'Estimating the Return to Education for Married Women', equation (15.17), coefficient on educ (source mroz_1987.ex15_1.paper); software reference mroz_1987.ex15_1.software: linearmodels 7.0: the reference specification of mroz_1987 ex15_1 (infer.iv_2sls, figure 'coef.educ') on an independent code path"}