_:B1e69760335c901a6c6029cbdf6ea1601 . _:B1e69760335c901a6c6029cbdf6ea1601 . _:B1e69760335c901a6c6029cbdf6ea1601 "2023-05-21"^^ . _:B1e69760335c901a6c6029cbdf6ea1601 . _:B1e69760335c901a6c6029cbdf6ea1601 . _:B1e69760335c901a6c6029cbdf6ea1601 "304901776" . _:B1e69760335c901a6c6029cbdf6ea1601 . _:B1e69760335c901a6c6029cbdf6ea1601 . _:B1e69760335c901a6c6029cbdf6ea1601 . _:B1e69760335c901a6c6029cbdf6ea1601 . "Mark" . "Armstrong" . "Mark Armstrong" . . . "Armstrong, Mark (Department of Economics, University College London)" . .