Fig. 6

Sensitivity of difference between \({\varvec{\nu}}\boldsymbol{ }\,\mathbf{and}\boldsymbol{ }\,\widehat{{\varvec{\nu}}}\) (Agriculture, Hokkaido). Plots the difference between two types of network effects in Table 5, allowing \({\varvec{\theta}}\) to vary under interval estimation: one in the 68% CI and the other in the 98% CI. If they are above zero under variation, the result shown in Table 5 is robust