Introduction

Non-tariff measures that can potentially affect trade in goods present the multilateral trading system with a basic policy challenge – how to ensure that these measures meet legitimate policy goals without unduly restricting or distorting trade. The same challenge applies to measures that can affect trade in services. This introduction discusses how the motivations for using non-tariff measures and services measures have evolved, complicating the policy panorama, but not changing the core challenge of how to manage the tension between public policy goals and trading opportunities.