Robert Kohn answered this article in "The Limitations of Pigouvian Taxes as a Long-Run Remedy for Externalities: Comment," saying that a Pigovian charge on contamination emanations would be able, truth be told, make the long-run social ideal without a single amount charge subsidy.[7] Carlton and Loury answered that very month, explaining that they were talking about a Pigovian charge on yield; though, Kohn was examining a Pigovian charge on emissions.[8] Carlton and Loury give mathematical confirmations regarding the reason why these are unique. Eventually, they contend that there are a few cases wherein a solitary expense on outflows will create the LRSO and others wherein a solitary duty on result will accomplish the LRSO. Either case just works with the not entirely settled