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As far as I understand two-stage least squares method (2SLS) is the generalization of instrumental variable (IV) method. What is the difference between these two estimation techniques? Can we use those interchangeably?

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  • $\begingroup$ This seems to be a duplicate. Virtually exactly the same question was already asked here. See our policy on duplicate questions here. $\endgroup$ – 1muflon1 Nov 9 '20 at 17:51

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