The Wong-Viner Envelope Theorem on the equality of long-run and short-run marginal costs (LRMC and SRMC) is reformulated for convex but generally nondifferentiable cost functions. The marginal cost can be formalized as the multi-valued subdifferential a.k.a. the subgradient set but, in itself,...

The “short-run approach” calculates long-run producer optima and general equilibria by building on short-run solutions to the producer’s profit maximization problem and on profit-based valuation of the fixed inputs. We outline this method and illustrate it on an example of peak-load pricing.

We study the link between homeownership and entrepreneurship by exploiting the longitudinal dimension of the British Household Panel Survey (BHPS) and constructing a detailed monthly-spell dataset that tracks individuals‟ job history and tenure choice, coupled with other time-varying...

In July 2000, the Taipei City Government launched an anti-poverty program, Taipei Family Development Accounts, which drew heavily on Sherraden¿s asset-based welfare theory, and was to provide matched savings accounts for low-income families in the City. This paper presents the ¿income to...

This paper solves an empirically parameterised model of life-cycle consumption which extends the precautionary savings models of Carroll (1997), and Deaton (1991), to allow for uncollaterized borrowing and default. In case households choose to default: (i) their access to credit markets is...

We consider borrowers with the opportunity to raise funds from a competitive banking sector that shares information, and from an alternative hidden lender. The presence of the hidden lender restricts the contracts that can be obtained from the banking sector. In equilibrium some borrowers obtain...

This paper provides a comprehensive description of the financial environment for households and small businesses in a defined geographical region. It develops a new, functional approach to financial access surveys, which involves asking detailed questions about how respondents meet their...

Individuals and business owners engage in an increasingly complex array of financial decisions that are critical for their success and well-being. Yet a growing literature documents that in both developed and developing countries, a large fraction of the population is unprepared to make these...

This paper investigates why children work by studying the wage elasticity of child labour supply. Incorporating subsistence constraints in to a model of labour supply, we show that a negative wage elasticity favours the hypothesis that poverty compels work whereas a positive wage elasticity...

This paper shows that smoking intensity, i.e. the amount of nicotine extracted per cigarette smoked, responds to changes in excise taxes and tobacco prices. We exploit data covering the period 1988 to 2006 across many US states. Moreover, we provide new evidence on the importance of cotinine...