1model,estimate,se,ci_low,ci_high,n,rmse2"adjusted, all rows incl. negative hours",0.25222449623309495,0.00947885217664965,0.23364628735208254,0.27080270511410737,1200,1.97732292723474063"unadjusted, all rows incl. negative hours",-0.13518960504279864,0.013896968221774055,-0.16242716225177342,-0.10795204783382387,1200,3.8609356507658914"adjusted, negative hours censored to 0",0.25417774688996747,0.009651549445013702,0.23526105758273308,0.27309443619720186,1200,1.97990301400523545adjusted + skill_index^2,0.25383792381516485,0.009844473118691516,0.23454311105575676,0.27313273657457293,1188,1.97564703705925716adjusted + skill^2 + skill^3,0.2537770909378334,0.009856378540208259,0.23445894398103173,0.2730952378946351,1188,1.975489445162097adjusted + hours^2 (linear term only reported),0.24919035540082057,0.027336302023172544,0.19561218796489296,0.30276852283674816,1188,1.97583583168118668"adjusted, conventional (non-robust) SE",0.25353820594501253,0.0098410870694658,0.2342303088883248,0.27284610300170026,1188,1.97585718288232689