Summary of performance under the two types of vertical integration
| Outcome indicators | Tests | Balanced mean | Partial mean | Mean difference | Standard error | T |
|---|---|---|---|---|---|---|
| Profit Margin Ratio (GHS) | Unmatched (T test) | 0.38 | 0.26 | 0.12* | 0.05 | 2.40 |
| Nearest neighbor matching | 0.37 | 0.29 | 0.08* | 0.06 | 1.33 | |
| Value Added to Sales Ratio (GHS) | Unmatched (T test) | 0.31 | 0.14 | 0.17** | 0.06 | 2.83 |
| Nearest neighbor matching | 0.32 | 0.17 | 0.15** | 0.07 | 2.14 |
Activities adopted by firms
| Type | Activity | Partial (%) | Balanced (%) |
|---|---|---|---|
| Backward integration | Maize farm | 10 | 10 |
| Feed mill | 100 | 100 | |
| Hatchery plant | 3.3 | 6.7 | |
| Forward integration | Processing plant | 0 | 13.3 |
| Distribution van | 0 | 76.7 | |
| Retail outlet | 0 | 40 |
Simple Linear Regression Model
| Variables | Coef. | St. err. | t-value | [95% conf. interval] | |
|---|---|---|---|---|---|
| Balance integration | 0.091** | 0.046 | 1.990 | −0.001 | 0.183 |
| Direct cost | −0.303*** | 0.069 | −4.400 | −0.441 | −0.165 |
| Size of firm | 0.184*** | 0.047 | 3.950 | 0.091 | 0.278 |
| Marketing cost | 0.220*** | 0.053 | 4.180 | 0.114 | 0.326 |
| Experience of manager | 0.017 | 0.026 | 0.650 | −0.035 | 0.068 |
| Managers education | −0.003 | 0.005 | −0.660 | −0.014 | 0.007 |
| Age of firm | −0.040 | 0.026 | −1.550 | −0.093 | 0.012 |
| Constant | 0.464 | 0.316 | 1.470 | −0.169 | 1.098 |
| R-squared | 0.448 | Number of obs. | 60 | ||
| F-test | 6.039 | Prob > F | 0.000 | ||
| Akaike crit. (AIC) | −36.458 | Bayesian crit. (BIC) | −19.703 | ||
Poultry firm demographics
| Variables | Balanced | Partial | |||
|---|---|---|---|---|---|
| Mean | Standard error | Mean | Standard error | Mean difference | |
| Age of firm | 18.90 | 3.72 | 16.20 | 3.18 | 2.70 |
| Size of farm | 47 484.00 | 13 835.37 | 22 116.33 | 6 229.03 | 25 401.00 |
| Experience of managers | 12.40 | 1.31 | 13.73 | 1.88 | −1.33 |
| Years of education of manager | 15.03 | 0.79 | 14.37 | 0.79 | 0.67 |
| Direct cost (GHS) | 1 997 359.96 | 554 367.03 | 1 096 085.80 | 302 092.11 | 901 274.17 |
| Marketing cost (GHS) | 61 428.00 | 14 667.27 | 37 795.00 | 10 662.19 | 23 632.90 |