Suppose that economic base of the city is experiencing a change in technology

Suppose that economic base of the city is experiencing a change in technology. Suppose that a dominant local industry, which produces something needed by all other local industries, used to display increasing returns to scale. The new technology reduces the average cost of production (given the current level of production) and displays constant returns to scale.Would the profit earned by local companies in other industries in equilibrium increase, decrease or stay the same because of the change in technology in the dominant industry?

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