Protection unconstrained by rules often varies substantially over time. Rules-based disciplines likeOECD industrial tariff bindings negotiated under GATT since 1947 and new Uruguay Roundbindings on agricultural and services trade and on developing country industrial tariffs, constrain...

Most of the large tariff reductions achieved in multilateral tradenegotiations have involved tariff-cutting formulas such as the Swissformula. However, wide variations in initial tariff rates between activeparticipants call for new approaches under the Doha Development Agenda.This paper surveys...