Table 3

Discrete-Change Effects of an Additional Neighboring Organic Dairy Farm

	Probit		Logit
	≤5 Miles	5–10 Miles	≤ 5 Miles	5–10 Miles
All data
Discrete-change effect	0.013^*	0.022^*	0.015^**	0.026^*
Standard error	0.006	0.009	0.008	0.012
Z-Statistic	2.085	2.471	1.797	2.284
Years 1998–2005
Discrete-change effect	0.009^*	0.016^*	0.011^**	0.019^*
Standard error	0.004	0.006	0.006	0.008
Z-Statistic	2.101	2.606	1.784	2.280
Years 2000–2005
Discrete-change effect	0.009^**	0.010^*	0.012^**	0.012^*
Standard error	0.005	0.004	0.007	0.006
Z-Statistic	1.950	2.337	1.844	2.208
Years 2002–2005
Discrete-change effect	0.014	0.022^**	0.022	0.031^**
Standard error	0.009	0.011	0.015	0.017
Z-Statistic	1.626	1.939	1.497	1.892

Note: Standard errors are calculated with the delta method.
↵* Significantly different from zero (5% level);
↵** significantly different from zero (10% level).