# Equation for pure wage contracts in the land market

I am reading "Development Economics" by Debraj Ray. I need to understand the different kinds of contracts in the land market.

Chapter 12.3.1 explains the contract forms. The general equation is: $$R = \alpha Y + F$$

Where $$R$$ is the total rental that the tenant pays to the landlord.

The tenant can give to the landlord a share of the output. $$Y$$ denotes agricultural output on the rented land, $$\alpha$$ is the share of the output that the tenant gives to the landlord. And/or the tenant can give a fixed rent, $$F$$ to the landlord.

If $$\alpha=0$$ and $$F>0$$, this is a fixed-rent contract with rent $$F$$. The tenant keeps all the output, but pays a rent. I understand that.

If $$0 < \alpha < 1$$ and $$F=0$$, then this is a sharecropping contract. The tenant doesn't pay any rent, but gives a fraction of the output to the landlord. I understand that.

If $$\alpha=0$$ and $$F<0$$, this can be interpreted as a "pure wage contract" where the wage is simply $$w = − F$$: the tenant is not a tenant at all, but a laborer on the landlord’s land.

I don't understand that. The tenant keeps all the output, and in addition he receives a salary from the landlord? Shouldn't it be $$\alpha=1$$, so that the tenant gives all the output to the landlord and receives a salary, instead of $$\alpha=0$$?

The same thing is replicated in slide 9 here.

What am I missing?