The state of the economy in Westeros and the Free Cities influences the most isolated smallfolk, let alone members of the City Watch. An economy is created when goods or services are bartered for other goods or services, or traded for currency.
King's Landing Edit
The Free Cities Edit
Braavos is arguably the most important trade port in the world - almost all trade barges going through the Shivering Sea will pass through Braavos, and it is not uncommon for ships as sailing all the way up the Narrow Sea to dock in Braavos before retreating back to the Summer Sea to continue their journey.