suitable theoretical review for market integration under intervention

hello scholars,
I am carrying out a research on Impact of government intervention on market integration and youth employment in poultry industry. this intervention adopts contract farming method (out grower/off takers). please, what economic theory can be applicable ?
the objectives are to
1. determine factors influencing participation of poultry farmers in the ABP ;
2. evaluate effect of ABP’s participation on the level of market integration among poultry farmers;
3. determine the effect of ABP participation on youth employment in the poultry industry;
4. estimate and compare the profitability of poultry production among beneficiaries and non-beneficiaries of ABP initiative;
5. identify the constraints faced by young poultry farmers in participating in the market under ABP.