Commercial:
friend: 2 base gold + 2 per era
ally: 3 base gold + 3 per era
Diplomatic:
friend: -12,5% influence degradation with all city-states
ally: -20% influence degradation with all city-states
(Percentage is taken of your natural influence degradation with policy/trait bonuses applied and doesn't make it drop below -0,2 influence per turn)
Intellectual:
friend: 2 base science + 2 per era
ally: 3 base science + 3 per era
Productive:
friend: 3 production per era distributed over your cities
ally: 4 production per era distributed over your cities
(Capitals get more. Cities founded earlier can also be benefited over cities founded later.)
Progressive:
friend: 2 base GP progress + 2 per era, distributed over your cities
ally: 3 base GP progress + 2 per era, distributed over your cities
(Same distribution as with production. The bonus is applied to the GP with the highest current progress in that city, or a random one if all progress is 0.)
Prosperous:
friend: 2 golden age progress per era + every GA is elongated by 1 turn
ally: 3 golden age progress per era + every GA is elongated by 1 turn