Group Decision-Making Approach without Weighted Aggregation Operators

<table class="fixed-width table-group" id="tab3"><tr><td><table class="table"><colgroup><col style="width:7.31em"/><col style="width:17.71em"/><col style="width:8.24em"/><col style="width:14.47em"/></colgroup><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Buy-back price </td><td class="align_center">Optimal concession equilibrium solution</td><td class="align_center">Concession value </td><td class="align_center">(Retailer loss, manufacturer loss)</td></tr><tr class="thead"><td class="align_left"> <svg height="6.1673pt" id="M475" style="vertical-align:-0.2063904pt" version="1.1" viewbox="-0.0498162 -5.96091 5.39742 6.1673" width="5.39742pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M383 397C383 424 344 448 299 448C244 448 172 409 132 375C66 319 23 227 23 146C23 42 74 -12 146 -12C208 -12 298 30 359 103L343 124C315 95 248 48 192 48C145 48 111 85 111 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id="g113-236"></path></g><g transform="matrix(.013,0,0,-0.013,107.723,0)"><path d="M275 270C275 450 212 609 64 710L45 686C145 604 203 442 203 270S147 -63 45 -147L64 -170C213 -68 275 89 275 270Z" id="g113-42"></path></g><g transform="matrix(.013,0,0,-0.013,112.221,0)"><path d="M275 270C275 450 212 609 64 710L45 686C145 604 203 442 203 270S147 -63 45 -147L64 -170C213 -68 275 89 275 270Z" id="g113-42"></path></g></svg></span></td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">7</td><td class="align_center">(1002, 29.11)</td><td class="align_center">(0.00, 0.00)</td><td class="align_center">(1839.67, 1352.20)</td></tr><tr><td class="align_left">7</td><td class="align_center">(1033, 1.88)</td><td class="align_center">(100.00, 0.00)</td><td class="align_center">(1912.44, 1324.97)</td></tr><tr><td class="align_left" colspan="4"><hr/></td></tr><tr><td class="align_left">13</td><td class="align_center">(1002, 29.11)</td><td class="align_center">(0.00, 0.00)</td><td class="align_center">(1352.20, 1839.67)</td></tr><tr><td class="align_left">13</td><td class="align_center">(1033, 1.88)</td><td class="align_center">(0.00,100.00)</td><td class="align_center">(1324.97, 1912.44)</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Optimal concession equilibrium solution, concession value, and risk loss value of retailer and manufacturer under different repurchase prices.</div>

Discrete Dynamics in Nature and Society

Group Decision-Making Approach without Weighted Aggregation Operators

Table 3