A response to pressures on pension finance caused by population ageing and economic turbulence has been a substantial move from traditional defined-benefit plans in which, at least in principle, all risk falls on the contributions side, to defined-contribution plans in which risk during accumulation all falls on the benefits side. This paper argues that both designs are ‘corner solutions’ and hence generally suboptimal, and goes on to set out a range of designs that offer different ways of sharing risk among workers, employers, future pensioners and current pensioners.

Interest payments based on income flows are a common feature of informal loans. Such so-called ’interlinked loans’ can be seen as insurance against very low disposable incomes, as interest payments are lowest when income turns out to be low. This paper examines whether interlinked loans indeed contain an insurance premium and how those premia are determined. A simple theoretical model predicts that interest rates of interlinked loans increase with income volatility when insurance premia exist. Based on data from a small-scale fishery in India, calculations show that, on average, lenders receive 25 per cent of the income, which corresponds to an average interest rate of 49 per cent p.a. A panel data analysis confirms theoretical predictions that interlinked loans contain an insurance component paid by the borrowers.