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复旦大学:《投资学讲义》(英文版) Chapter 19 GMM and regression- based tests of linear factor model

General GMM formula Let y, be an h-vector of variables that are observed at date t, let denote an unknown vector of coefficients, h(e, y,) Be an r-vector real function. Let denote true value of 0, and suppose this true value is
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