A researcher interested in examining the relationship between wage and unemployment experience, uses panel data from the UK over the years 2011- 2015, and estimates the following relationship: lwageit = x + a + Eit i = 1,.., N and t = 1,..,5 (where, lwage=the logarithm of weekly wage; x contains the variables of interest: unwks- the number of weeks unemployed in the previous year), and two control variables: age and age/100= age* age/100. The results from the estimation of model in equation (1), using two different linear panel data estimators are provided in Columns [1]-[3] of Table 1. Total number of individuals in the sample N = 1,200. (1) VARIABLES age age/100 unwks Constant Individual time averages mean(age) Table 1 [1] WG 0.130*** (0.007) -0.134*** (0.009) -0.004*** (0.001) 4.266*** (0.146) [2] GLS1 0.115*** (0.005) -0.147*** (0.007) -0.005*** (0.001) 4.514*** (0.104) [3] GLS2 0.130** (0.007) -0.134*** (0.009) -0.004*** (0.001) 4.603*** (0.144) GLS1 -0.000 (0.010) -0.020 Mean(age/100) (0.013) mean(unwks) -0.053*** (0.010) Notes: (i) Standard errors in parenthesis with robust standard errors in Column [1]; (ii) *** p