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  "Title": "Classical Simultaneous Equation Models",
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  "Date": "2016-10-25",
  "Maintainer": "Andrew J. Spieker <aspieker@upenn.edu>",
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  "Description": "Likelihood-based approaches to estimate linear regression\nparameters and treatment effects in the presence of\nendogeneity. Specifically, this package includes James\nHeckman's classical simultaneous equation models-the sample\nselection model for outcome selection bias and hybrid model\nwith structural shift for endogenous treatment. For more\ninformation, see the seminal paper of Heckman (1978)\n<DOI:10.3386/w0177> in which the details of these models are\nprovided. This package accommodates repeated measures on\nsubjects with a working independence approach. The hybrid model\nfurther accommodates treatment effect modification.",
  "License": "GPL-2",
  "NeedsCompilation": "no",
  "Packaged": {
    "Date": "2026-05-18 07:13:38 UTC",
    "User": "root"
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  "Author": "Andrew J. Spieker [aut, cre]",
  "Repository": "https://cran.r-universe.dev",
  "Date/Publication": "2016-10-29 10:48:20 UTC",
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