A common market is a kind of trade agreement in which members remove internal barriers to trade, adopt common strategies for dealing with non-members, and allow members to move freely among themselves. Member States benefit from trade agreements, including by creating more employment opportunities, reducing unemployment rates and experimenting with the market. Since trade agreements are usually accompanied by investment guarantees, investors wishing to invest in developing countries are protected from political risks. SAFTA would have a similar impact on customs revenues. Smaller countries could find that their tariff collection decreases by up to 2 1/2 of GDP (for Bhutan), while India and Pakistan could not experience any significant change.