id	keyword
bae-3224	production
bae-3224	farm
bae-3224	function
bae-3224	efficiency
bae-3224	aquaculture
bae-3224	size
bae-3224	output
bae-3224	ray
bae-3224	farm size
bae-3224	model
bae-3224	land
bae-3224	production function
bae-3224	productivity
bae-3224	sample
bae-3224	inputs
bae-3224	vector
bae-3224	economics
bae-3224	ray production
bae-3224	relationship