Dummy variable trap
The dummy variable trap occurs in econometric models when dummy variables (binary variables taking values 0 or 1) are included in a regression model in such a way that they cause multicollinearity. Multicollinearity arises when two or more explanatory variables ____ _______ ________ ____ ___ ___ ___ ________.
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What is meant by identification in a simultaneous equation model? Check the identification status of the equations in the following model:
Demand function: Qt = ao + a₁Pt + a2Xt + U1t
Supply function: Qt = Bo + B₁Pt + U2t
गत्यात्मक प्रतिमान से क्या तात्पर्य है? समझाइए कि निम्नलिखित प्रतिमान का अनुमान कैसे लगाया जा सकता है; yt=Bxt +Yyt-1+ut जहाँ |y| < 1 और ut=put-1+vt है। उपरोक्त मॉडल मेंvt स्वतंत्र रूप से और सामान्य रूप से वितरित है, जिसका माध्य शून्य और विसरण और a2 |P| < 1 है।
While estimating a regression model you found that the explanatory variable is measured with certain error. Specify the model. What are its consequences on the parameters?
What is meant by a dynamic model? Explain how the following model can be estimated?
where [y] < 1 and Ut = p ut-1 + Vt. In the above model ve is distributed independently and normally with mean zero and variance a2 and |p| < 1.
What are the limitations of the linear probability model (LPM)? Explain how these limitations are taken care of by the probit model.
युगपत समीकरण प्रणाली में अभिनिर्धारण का क्या अर्थ है? निम्नलिखित मॉडल में समीकरणों की
अभिनिर्धारण स्थिति की जाँच कीजिए:
माँग फलन : Qt=ao+a1pt+a2Xt+u1t
आपूर्ति फलन : Q1=Bo+B1Pt+u2t
What is meant by heteroscedasticity? What are its consequences? How do you detect the presence of heteroscedasticity in a data set?