Table 1.

Characteristics of survey respondents.

Variable	Description	N	Mean	Std. dev.
AGE	Age of producer (in years)	276	53.366	12.107
COLLEGE	= 1 if 4 year college degree or graduate degree; 0 otherwise	279	0.563	0.497
WHAT OPERATION TYPE BEST DESCRIBES YOUR HOG OPERATION?
FARROWFINISH	= 1 if farrow to finish; 0 otherwise	371	0.299	0.459
BREEDING	= 1 if breeding/farrowing or nursery; 0 otherwise	371	0.105	0.307
WEANFINISH	= 1 if wean to finish; 0 otherwise	371	0.364	0.482
FINISH	= 1 if finish; 0 otherwise	371	0.173	0.378
OTHEROPERATION	= 1 if boar stud or gilt developer unit or other operation type; 0 otherwise	371	0.059	0.237
WHICH BUSINESS ARRANGEMENT BEST DESCRIBES THE AGREEMENT UNDER WHICH YOU ARE PRESENTLY PRODUCING HOGS?
INDEPENDENT	= 1 if independent producer; 0 otherwise	369	0.485	0.500
INTEGRATOR	= 1 if contractor or integrator; 0 otherwise	369	0.106	0.308
CONTRACTGROWER	= 1 if contract grower (contractee); 0 otherwise	369	0.360	0.481
OTHERBUSINESS	= 1 if other business arrangement; 0 otherwise	369	0.049	0.216
IOWA	= 1 if Iowa pork producer; 0 otherwise	371	0.604	0.490
PRODUCTIONSITES	Number of separate productions sites (unique premise ID, unique address) in 2016	351	16.436	57.481
HIGHRATING	= 1 if producer's operation biosecurity is perceived to be higher than other operations in the area; 0 otherwise	336	0.830	0.376
REPORTABLE	= 1 if a producer's operation has experienced PRRSV and/or PEDV in the past 3 years; 0 otherwise	354	0.684	0.466
HOW MANY TIMES IN THE NEXT 100 YEARS DO YOU THINK A TIER 1 DISEASE OUTBREAK WILL OCCUR IN THE U.S. SWINE INDUSTRY?
NOOUTBREAKS	= 1 if no outbreaks expected; 0 otherwise	298	0.091	0.288
ONEOUTBREAK	= 1 if one outbreak expected; 0 otherwise	298	0.235	0.425
TWOOUTBREAKS	= 1 if two or more outbreaks expected; 0 otherwise	298	0.674	0.469