The international poverty line is a monetary threshold under which an individual is considered to be living in poverty. This threshold is calculated using Purchasing Power Parity. According to the World Bank, the international poverty line was most recently updated in October 2015, in which it was increased from $1.25 per day to $1.90 per day using the value of 2011 dollars. Raising this threshold helps account for changes in costs of living, which directly effects individuals ability to obtain basic necessities across countries. With Hong Kong being one of the largest and most expensive cities in the world, there is no surprise that a portion of the population is living in poverty.