Table 2 Representation of earnings expectations of environmentally polluting firms.

From: A system dynamics-based model for the evolution of environmental group events

Expectation of benefits from direct sewage discharges by enterprises

Enterprise pretreatment emission benefit expectations

Average firm earnings expectations

\(\varphi_{d}\)

\(\varphi_{t}\)

\(\varphi = u\varphi_{d} + \left( {1 - u} \right)\varphi_{t}\)