Table 6. Weekly Overall Performance for All Survey Respondents–Fixed Effects (Within-Person) Generalized Least Squares Regression with AR(1) Errors.

	Employee-Rated Performance		Supervisor-Rated Performance
	Model 1	Model 2	Model 1	Model 2
Had treadmill during the current week	0.69±0.11***	0.90±0.13***	1.11±0.16***	1.16±0.20***
Number of weeks with treadmill		−0.04±0.02***		−0.01±0.02
(Number of weeks with treadmill)2 * 103		0.76±0.31***		0.29±0.48
Moved office locations	0.36±0.08***	0.36±0.10***	0.34±0.10***	0.35±0.10***
Absence due to illness	−0.17±0.03***	−0.17±0.03***	0.06±0.05	0.06±0.05
Changed duties	0.03±0.05	0.03±0.05	0.20±0.07***	0.20±0.07***
Constant	8.11±0.01***	8.12±0.02***	7.95±0.02***	7.95±0.02***
N	7325	7325	3679	3679
F	23.6	16.87	17.81	12.60
Prob>F	0.00	0.00	0.00	0.00

Notes: (1) Standard errors are corrected for serial correlation. (2) *, ** and *** indicate statistical significance at the 0.1, 0.05 and 0.01. (3) “Had treadmill during the current week” is an indicator variable talking on the value of 1 when the walker had a treadmill in his or her office, and 0 when he or she did not have a treadmill in his or her office.