why is it helpful to see a correlation matrix? why is correlation important why is it important to have a correlation matrix in panel data why does a correlation matrix need to be used why should we see the correlation matrix when analyzing panel data is it important to see the correlation matrix why is the correlation matrix so important why is a correlation matrix important why is correlation analysis used why is it important to see correlation in panel data why does correlation truncate panel data why is it important to see correlation matrix why is it important to see correlation matrix in panel data why is it important to see the correlation matrix in data analysis which variables can be identified using a correlation matrix why does correlation matrix need to be used in panels data when to use correlation matrix why is it importance to use a correlation matrix why are correlations important why is it important to see the correlation matrix in panel data?