Consider the market for bolts. Suppose that a hardware factory dumps toxic waste into a nearby river, creating a negative externality for those living downstream from the factory. Producing an additional ton of bolts imposes a constant marginal external cost (MEC) of $75 per ton. The following graph shows the demand (marginal private benefits, or MPB) curve and the supply (marginal private costs, or MPC) curve for bolts. Use the purple points (diamond symbol) to plot the marginal social costs (MSC) curve when the marginal external cost is $75 per ton. 500 450 MSC 400 350 Supply (MPC) 300 250 200 150 100 Demand 50 (MPB) 4 QUANTITY (Tons of bolts) PRICE (Dollars per ton of bolts) The market equilibrium quantity is tons of bolts, but the socially optimal quantity of bolt production is tons. To create an incentive for the firm to produce the socially optimal quantity of bolts, the government could impose a bolts. per ton of

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Market Failure Analysis

To understand Market failure, we need to first understand welfare economics. An Italian economist, Vilfredo Pareto stated that allocation of resources in an efficient manner such that an economic change, which harms no one and makes someone better off, indicates an increase in social welfare. It is also called Pareto Optimality, where resources cannot further be reallocated without harming one. This does not apply to those economic changes, which harm some and benefit others. social welfare increases if the utility of any of its members' increases and none decrease in the economy.