Banks, liquidity crises and economic growth

How do the liquidity functions of banks affect investment and growth at different stages of economic development? How do financial fragility and the costs of banking crises evolve with the level of wealth of countries? We analyze these issues using an overlapping generations growth model where agents, who experience idiosyncratic liquidity shocks, can invest in a liquid storage technology or in a partially illiquid Cobb Douglas technology. By pooling liquidity risk, banks play a growth enhancing role in reducing inefficient liquidation of long term projects, but they may face liquidity crises associated with severe output losses. We show that middle income economies may find optimal to be exposed to liquidity crises, while poor and rich economies have more incentives to develop a fully covered banking system. Therefore, middle income economies could experience banking crises in the process of their development and, as they get richer, they eventually converge to a financially safe long run steady state. Finally, the model replicates the empirical fact of higher costs of banking crises for middle income economies.

Brazil's middle classes

This paper discusses the Brazilian middle class, its definition, evolution, profile, attitudes and durability. It describes the methodology that uses per capita household income derived from household surveys to determine economic classes. It gauges their respective aggregate trends and gauges individual income risks using longitudinal data. An income-based approach is only the beginning. This initial approach is integrated with subjective data to measure expectations and attitudes of different economic classes combined with a structural approach that takes into account the roles played by human, physical and social capital in the production factors, in terms of income generation and temporal allocation of resources. In all cases, income is the chosen numeraire by which all dimensions analyzed are projected. In the end of the article, all forms of measurement proposed – current income, consumption smoothing (permanent income), productive assets and subjective aspects – are combined to discuss the design of public policies aimed at the Brazilian middle classes.