PPP | SPP | SSP | TGW | Yield | |
PPP | 1 | −0.222 | −0.093 | −0.044 | 0.103 |
SPP | 1 | 0.372** | −0.050 | 0.744** | |
SSP | 1 | −0.071 | 0.615** | ||
TGW | 1 | 0.297* | |||
Yield | 1 |