Hello,
I am using Stata 14.
Question 1:
I tried to test for Stationary for the dependent variable Y and for each explanatory variable included in my model. I applied the command ‘xtunitroot’ with the option ‘IPS’ as the data type of my research is unbalanced panel data, the time period is 22 years, annual data for 5084 firms. To test for Stationary for the dependent variable Y, I typed in Stata the following: xtunitroot ips Y. Stata shows the following message: “insufficient observations r(2001);”. To test for Stationary for the first explanatory variable X1, I typed in Stata the following: xtunitroot ips X1. Stata shows the following message: “no observations r(2000);”. Thus, I kindly ask you please to highlight what I did wrong and what I should do.
Question 2:
My model includes 10 explanatory variables where nine of them are lagged one year, while only one of these explanatory variables is in the current time/present period (i.e., not lagged. It is in time t). What is the command to run such a regression?
Thank you in advance.
I am using Stata 14.
Question 1:
I tried to test for Stationary for the dependent variable Y and for each explanatory variable included in my model. I applied the command ‘xtunitroot’ with the option ‘IPS’ as the data type of my research is unbalanced panel data, the time period is 22 years, annual data for 5084 firms. To test for Stationary for the dependent variable Y, I typed in Stata the following: xtunitroot ips Y. Stata shows the following message: “insufficient observations r(2001);”. To test for Stationary for the first explanatory variable X1, I typed in Stata the following: xtunitroot ips X1. Stata shows the following message: “no observations r(2000);”. Thus, I kindly ask you please to highlight what I did wrong and what I should do.
Question 2:
My model includes 10 explanatory variables where nine of them are lagged one year, while only one of these explanatory variables is in the current time/present period (i.e., not lagged. It is in time t). What is the command to run such a regression?
Thank you in advance.
