Costs data used to estimate potential earnings from trophy hunting.

aIn most countries, lease length is largely consistent among blocks, but in Mozambique, due to high variability in this measure, mean lease length ± SE reported by operators was used.bWe assumed (using data from the surveys) that 61±19.1% (mean ± SD) of running costs were fixed, and the remainder were variable.cDue to a small sample size, we used the Tanzanian mean value for start up and operating costs in Zambia, but used the minimum and maximum values from Zambia.