Hypotheses, variables and expected signs
| Variable | Description | Type | Hypothesis | Expected sign | |
|---|---|---|---|---|---|
| log Vol | Log volume | Annual volume acquired (natural logarithm) | Continuous | H1 | + |
| EmpMA | Better alternative | Identifies if the observed supplier is the closest supplier to the buyer company, compared to competitors | Discrete | H2 | + |
| Distan | Distance | Distance, in kilometers between buyer and supplier | Continuous | H3 | − |
| AdProd | Additional products | Identifies if the observed contract involves more than one product | Discrete | H4 | + |
| Variable | Description | Type | Hypothesis | Expected sign | |
|---|---|---|---|---|---|
| log Vol | Log volume | Annual volume acquired (natural logarithm) | Continuous | H1 | + |
| EmpMA | Better alternative | Identifies if the observed supplier is the closest supplier to the buyer company, compared to competitors | Discrete | H2 | + |
| Distan | Distance | Distance, in kilometers between buyer and supplier | Continuous | H3 | − |
| AdProd | Additional products | Identifies if the observed contract involves more than one product | Discrete | H4 | + |
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