Thus the new equilibrium point is really at e”, the new intersection of the shifted demand and supply curves.
So whether or not the the new equilibrium point e” is to the left or right of the original equilibrium point is going to depend on the relative elasticities of the supply and demand curves, and the relative difference in the size of the shift of those curves.If the demand is inelastic and the price for imports is sufficiently lower, ( a decrease to something less than 50% of the domestic price of production,) the increase in consumer welfare in the domestic market could be comparable to and even greater than the loss in domestic revenue. So the domestic economy might even show a benefit.
In general, if we just compute the gain in consumer welfare to the loss or producer welfare, there will generally be some gain. However, this neglects the loss in producer welfare to producers of factors higher up the production chain. The costs to a producer are always revenues to the producers of factors to that producer, and these other producers will also suffer Whether this chain of suffering amplifies or diminishes as it propagates would seem to require a closer analysis of the different cases..
With balanced trade, there is an increase in welfare for everybody. Producers get to produce more. Consumers get to consume more. However, that increase also includes an increase in marginal production and marginal consumption. The possibility remains that the increase in benefits is at a cost in resources which would be more efficiently used elsewhere in the trading countries, the cases generally being those with inelastic supply and elastic demand.
EDIT: Diagram and discussion corrected 05-20-2019 .