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Team Salary Analysis

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Words 837
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Model Specification:
More able players and coaches should have higher salary, thus the team who spend the most on salary should has the best performance. Therefore we want to put this simple labor economics theory into a simple regression test to see whether the team total salary has a positive effect on the team number of win.
Data:
To answer this question we need to run a single variable linear regression of each team total salaries on the number of win by each team. The cross sectional data we had obtained from the NFL official website consists each team total salaries and their number of total win per season from 2010 to 2014. The reason we did not take data from different decade is because we are trying to use relevant data to prevent the problem of inflation and economic cycle effect.
Results:

We have find that the intercept is 1.72 and the slop of the regression line is 0.0628, which …show more content…
(December is not included to avoid the dummy variable trap, we also ruled out all of the big game which held on January). It turns out seasonality does not affect total game score since none of the p-value for the monthly variable is found statistical significant.
We observed that on average holding other variables constant, 1% increase in humidity would lead to a 0.0865 total game score decrease for each NFL game, with a P value of 0.0008, the beta of the variable is statistical significant. We also observed that on average holding other variables constant, 1 mile per hour increase in wind speed would lead to a 0.908 total game score decrease for each NFL game, with a P value so close to 0, the beta of the variable is statistical significant. Unlike the two other weather condition variable, the temperature variable is found statistical insignificant due to its 0.35

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