Table 1. Model parameters for biophysical processes and agent attributes.

BIOPHYSICAL PROCESSES
Land-Use		Avg. Yielda (kg ha−1)		Degradation/RegenerationRates (kg ha−1 yr−1)	Avg. Priceb ($ kg−1) [33]
Intensive Ag. [34]		3,500		0/0	0.13
Extensive Ag. [35]–[37]		2,700		0.25/0.04	0.13
Pasture [38], [39]		1,700		0.18/0.5	0.13
AGENT ATTRIBUTES
Parameter Name		Value	Units	Notes	Source
Household size	h	4	people	While the household size is held constant,the number of households per agentchanges with population density.	[40]
Total available labor	Ltot	96	person-weeks household−1	Fifty-two weeks in a year less 15 for leisure,multiplied by 2 for 2 adultsand 1 for 2 children.	[41]
Minimum subsistence requirements	δmin	860	kg yr−1 person−1	Based on a diet of moderate meatconsumption; includes grain for feed.	[40]
Risk preferences	Rpref	0 to 1	N/A	Certainty equivalent of a riskyactivity (i.e. risk-aversion).	[7], [8]
Initial household subsistencestock	Ssub	2,580	kg	Initial food stocks are assumed tocover a year’s subsistence requirements.	N/A
Initial household money stock	Smon	1,426	dollars	Combined farm input costs and the costof a year’s subsistence needs at thelong-term average crop price witha market influence of 0.5.	N/A

^aAll agricultural yields are reported in grain equivalents.

^bAgricultural product prices are assumed equal to control for agricultural commodity-differentiated price effects, and are based on the 5-year average farm price of wheat.