In Peru only a small percentage of the country's informal sector has new land titles.
Most people in Africa still work in the informal sector, while unemployment is rife.
They are working in the informal sector with very low earnings and very low productivity.
In Brazil and Turkey, around half of non-farm workers are in the informal sector.
Millions will return from formal employment to the informal sector and from cities to rural areas.
But the majority of the informal sector isn't staying outside the law simply to avoid paying taxes.
In fact, a rising proportion of Argentines work in the informal sector, and have no pension arrangements.
Other analysts stress splits within countries between the modern, internationalised, economy and the large and growing informal sector.
Almost two-thirds of the world's workers are still employed in the informal sector.
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Inability to register a business or property is what most commonly keeps people in the informal sector of the economy.
Adcorp reaches this remarkable, and presumably contestable conclusion by including "informal sector jobs", which it concedes are hard to measure accurately.
There are two reasons for the growth of the this informal sector.
Ms Farrell estimates that formalising the informal sector could add 0.8 percentage points to Portugal's productivity growth, and 1.5 percentage points in Turkey and Brazil.
Lower barriers to entry are associated with a smaller informal sector.
ECONOMIST: A World Bank report makes surprisingly cheerful reading
Their place in Brazil's economic structure may be precarious, but they enjoy a higher status than the wide variety of people working in the informal sector.
The Peruvian economy underwent considerable free market reforms since 1992, from legalizing parts of the informal sector to significant privatization in the mining, electricity and telecommunications industries.
As such, the Brazilian economy is heavily driven by the informal sector which accounts for 40% of GNP versus 9% in the US (world average is 33%).
In urban Bolivia, for example, women are much more likely to be self-employed in the informal sector with no legal status, regulations or standard work conditions and low pay.
This is what has happened with mandatory savings schemes in Latin America, which have been a boon to secure workers but have left the poor, and those in the informal sector, without an adequate safety net.
These comparatively high rates have been assumed as necessary from the beginning, due to the fact that the project activities must compete with high opportunities cost for labour caused by the strong presence of the informal sector.
Some of the key sources of inequality in China include the geographical factors, a large and persistent informal sector, gaps in access to education, and barriers to employment and career progression for specific groups, particularly rural migrants, the OECD says.
The recent Wenzhou experiment, which officially recognizes and sanctions the informal banking sector, is an explicit admission of past discrimination.
President Ollanta Humala's Cabinet chief, Oscar Valdes, said Thursday that the government remains firm on its intention to regulate the informal mining sector.
"The informal care sector is essential, " says Dr Eva Lloyd, reader in early childhood at the University of East London and co-author of Childcare Markets: Can they deliver an equitable service?
These, in conjunction with a booming and innovative recycling industry that helps turn around the discarded waste of Mumbai's 21 million residents, form a productive but often "informal" sector that many fear will be lost when the redevelopment is complete.
However, the massive growth projected for these innovations so far takes place outside the formal banking sector, in informal, unregulated networks and outside of the banking system.
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Parts of the traditional small enterprise sector and of the informal economy service particular components of the advanced sectors in a city.
And due to the constraints of offline commerce businesses, women-led companies tend to be small, informal and concentrated in the commerce sector, where profits and margins are low (and often use less credit).
We took an informal poll of associates who are professionals in the mobile phone sector to assess the the level of their relationship with their smartphone, whether Apple, Google Android or RIM Blackberry.
To put it simply, they decide to stay informal because the total costs of entry, operation and exit associated with joining the formal sector are greater than the potential benefits.
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