Having an income below the poverty line, which is defined as an income needed to purchase basic needs, is also referred to as primary proverty. The "dollar a day" poverty line was first introduced in 1990 as a measure to meet such standards of living. For nations that do not use the US dollar as currency, "dollar a day" does not translate to living a day on the equivalent amount of local currency as determined by the exchange rate. Rather, it is determined by the purchasing power parity rate, which would look at how much local currency is needed to buy the same things that a dollar could buy in the United States. Usually, this would translate to having less local currency than if the exchange rate was used as the United States is a relatively more expensive country.From 1993 through 2005, the World Bank defined absolute poverty as $1.08 a day on such a purchasing power parity basis, after adjusting for inflation to the 1993 US dollar and in 2008, it was updated as $1.25 a day (equivalent to $1.00 a day in 1996 US prices) and in 2015, it was updated as living on less than US$1.90 per day, and moderate poverty as less than $2 or $5 a day. Similarly, ultra-poverty is defined by a 2007 report issued by International Food Policy Research Institute as living on less than 54 cents per day. The poverty line threshold of $1.90 per day, as set by the World Bank, is controversial.
Mass production of goods in places such as rapidly industrializing China has made what were once considered luxuries, such as vehicles and computers, inexpensive and thus accessible to many who were otherwise too poor to afford them.Even with new products, such as better seeds, or greater volumes of them, such as industrial production, the poor still require access to these products. Improving road and transportation infrastructure helps solve this major bottleneck. In Africa, it costs more to move fertilizer from an African seaport 100 kilometres (60 mi) inland than to ship it from the United States to Africa because of sparse, low-quality roads, leading to fertilizer costs two to six times the world average. Microfranchising models such as door-to-door distributors who earn commission-based income or Coca-Colas successful distribution system are used to disseminate basic needs to remote areas for below market prices. Health care and education
Nations do not necessarily need wealth to gain health. For example, Sri Lanka had a maternal mortality rate of 2% in the 1930s, higher than any nation today. It reduced it to 0.5–0.6% in the 1950s and to 0.6% today while spending less each year on maternal health because it learned what worked and what did not. Knowledge on the cost effectiveness of healthcare interventions can be elusive and educational measures have been made to disseminate what works, such as the Copenhagen Consensus.