As I point out there, perfect price discrimination results in meeting all efficiency conditions — until you allow for rent seeking in order to become the monopoly, which may convert it from the best solution to the efficiency problem of monopoly to the worst, since the firm collects all producer and consumer surplus and then competes it away in the process of becoming the monopoly. See Tullock's classic article on rent seeking, "The Welfare Cost of Tariffs, Monopoly and Theft."
?? Price discrimination sells products at each individual's value price (above marginal cost), so there is no excess consumer value generated. The welfare gain goes to the producer in additional profits.
You will find some of this in my _Price Theory_: http://www.daviddfriedman.com/Academic/Price_Theory/PThy_Chapter_16/CHAP16.html. The relevant section starts with the subtitle "Discriminatory Monopoly: The Solution?"
As I point out there, perfect price discrimination results in meeting all efficiency conditions — until you allow for rent seeking in order to become the monopoly, which may convert it from the best solution to the efficiency problem of monopoly to the worst, since the firm collects all producer and consumer surplus and then competes it away in the process of becoming the monopoly. See Tullock's classic article on rent seeking, "The Welfare Cost of Tariffs, Monopoly and Theft."
pro-bono is not a price-driven market but simply a wealth transfer
Price discrimination may not reduce total welfare but it shifts welfare gains from consumers to producers.
?? Price discrimination sells products at each individual's value price (above marginal cost), so there is no excess consumer value generated. The welfare gain goes to the producer in additional profits.