What are the reasons of having insignificant coefficient (p value) from regression output?
An insignificant coefficient in a regression output typically indicates that the corresponding predictor variable does not have a statistically significant relationship with the dependent variable. There are several reasons why this might occur: Multicollinearity : When predictor variables are highly correlated with each other, it can cause inflated standard errors for the coefficients, leading to insignificant p-values. Sample Size : A small sample size can result in insufficient statistical power to detect significant effects, leading to higher p-values. Measurement Error : If the predictor variable is measured with error, it can reduce the observed association between the predictor and the dependent variable, resulting in an insignificant coefficient. Model Misspecification : If the model is incorrectly specified (e.g., omitting important variables, using an incorrect functional form), it can lead to biased and inefficient estimates, making the coefficients insignificant. High Var...
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