Consider the simple model to estimate the effect of technology investment on labor productivity of M enterprises:  product = Bo + B1 ln K + B2 ln L + B3 tech + B3 size + u In which, product is the labor productivity; tech is the total technology investment value/total investment value; ln K is the natural logarithm of total capital; ln L is the logarithm of total labor; tech is total techonology investment value/total investment value; size is the size of the enterprise, the dummy variable includes four categories: 1-super small; 2-small; 3-medium; 4-large (size_1 is the base category). d. Could you give some solutions to the endogenous variable problem?

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Consider the simple model to estimate the effect of technology investment on labor productivity of M enterprises: 

product = Bo + B1 ln K + B2 ln L + B3 tech + B3 size + u

In which, product is the labor productivity; tech is the total technology investment value/total investment value; ln K is the natural logarithm of total capital; ln L is the logarithm of total labor; tech is total techonology investment value/total investment value; size is the size of the enterprise, the dummy variable includes four categories: 1-super small; 2-small; 3-medium; 4-large (size_1 is the base category).

d. Could you give some solutions to the endogenous variable problem?

 
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