Maize is a crucial crop in Ghana, but there's a gap between what's produced and what's needed, leading to high import costs. Researchers studied maize farming in northern Ghana to see if farmers there have an advantage in producing maize instead of importing it. They looked at how a fertilizer subsidy program affected maize yields and profits. Farms with high yields are profitable and help the economy, while those with low yields need government help. Combining different policies can make maize production more efficient.