1, market demand and price of products;

2. Production technology;

3, the price of production factors;

4. Marginal productivity means that, under other conditions unchanged, every additional unit of production factor input will increase output.

Law of diminishing marginal productivity: the input of one factor is increasing, while other factors are inconvenient. The marginal product of variable factors can increase or remain the same for a period of time, but it will eventually decrease.