一致性猜測變量在利潤極大廠商中研究者頗多，唯獨在共營廠商領域未曾有人提及。本文主旨在研究産品同質與異質時共營廠商的一致性猜測變量是否存在、唯一？並探討產品異質時，以價格爲選擇變數和以數量爲選擇變數二者之猜測變量有何關係？研究結果顯示：在線性需求函數以及邊際成本固定的假設下，雙佔共營廠商生產同質產品的一致性猜測變量存在但非唯一，雙佔共營廠商生產異質產品時的數量與價格一致性猜測變量均存在且唯一，另外，共營廠商之數量一致性猜測變量與價格一致性猜測變量之間的關係式不同於利潤極大廠商時數量一致性猜測變量與價格一致性猜測變量之間的闢係。共營廠商與利潤極大廠商的結論不盡相同，本文有詳細的比較，並且指出其差異。

This paper studies the existence and uniqueness of consistent con­jectural equilibrium of labor-managed firms producing homogeneous or heterogeneous products. It also demonstrates the relationship between price conjectural vari­ations and quantity conjectural variations in a differentiated product market. It is found that consistent conjectural equilibrium is existent and unique in an oligopolistic labor-managed firm model with linear de­mand and constant marginal cost. Moreover, the paper also compares the relation between quantity conjectural variation and price conjectural variation in labor-managed firms to that in profit-maximizing firms.