Consider an oligopolistic market with a linear demand of P(Q)=204-2Q. There are 4 identical firms in this market that choose their profit-maximizing quantities simultaneously. Each firm faces a cost function of C(q) = 70q. Use the generalized Cournot model to determine the own-price elasticity of residual demand that each firm in this market faces. The own-price elasticity of residual demand is. (Enter your answer rounded to four decimal places; include a negative sign if appropriate).