In the long run it might hurt small book shops as well, as the number of new books published in France drops, especially books published by new authors (as they

In the long run it might hurt small book shops as well, as the number of new books published in France drops, especially books published by new authors (as they are less likely to sell at high prices) and the number of books people read drops overall so the whole industry shrinks overtime. I think that's what happaned with a similar law in Israel. These bad effects were predicted a head of adopting the law in Israel and then actually materialized. Finally this law of price control was drop altogether due to these adversarial effects.