Assessing Values-based Sourcing Strategies in Regional Food Supply Networks : An Agent-based Approach
was a medium difference between the following pairs of means : between Policy 2 and Policy 3 ( Size ) ( d = −0.64 ), between Policy 2 and Policy 5 ( Size & Price ) ( d = −0.63 ), between Policy 3 and Policy 4 ( d = 0.53 ), and between Policy 4 and Policy 5 ( d = −0.52 ).
Medium producers . The number of medium-sized producers ( green bars in Figure 5 ) was significant ( F ( 4,4995 ) = 35.3 , p < 0.001 ) across the five different policies . In the figure , means that do not share a ( lower case ) letter are significantly different , as calculated by post-hoc analysis . Policy 1 ( No Management ) showed a small difference between every other policy : Policy 2 ( d = 0.41 ), Policy 3 ( d = 0.48 ), Policy 4 ( d = 0.30 ), and Policy 5 ( d = 0.31 ).
Large producers . The number of large producers ( red bars in Figure 5 ) was significant ( F ( 4,4995 ) = 39.1 , p < 0.001 ) across the five different policies . In the figure , means that do not share a ( Greek ) letter are significantly different , as calculated by post-hoc analysis . Policy 1 ( No Management ) showed a difference between every other policy : Policy 2 ( d = 0.39 , small ), Policy 3 ( d = 0.52 , medium ), Policy 4 ( d = 0.21 , small ), and Policy 5 ( d = 0.35 , small ). Additionally , there was a small ( d = −0.29 ) difference between Policies 3 ( Size ) and 4 ( Price ).
Average Producer Price
Figure 6 illustrates the means for the number of participating producers by
price : low price ( blue ), medium price ( green ), and high price ( red ), under each policy option .
Figure 6 . Average price category of producers under each policy option . Means from each producer size category that do not share a letter are significantly different .
Low price . The number of low-price producers ( blue bars in Figure 6 ) was significant ( F ( 4,4995 ) = 104.5 , p < 0.001 ) across the five different policies . In the figure , means that do not share a ( uppercase ) letter are significantly different , as calculated by post-hoc analysis . There were small differences between the following
41