This paper studies the design of the optimal non linear taxation in an economy where longevity varies across agents, and depends on three factors: longevity genes, health investment and farsightedness. Provided earnings, farsightedness and genes are correlated, governmental intervention can be...

Evaluating the sustainability of a society requires a system of shadow or accounting values derived from the sustainability objective. As a first step toward the derivation of such shadow values for a maximin objective, this paper studies an economy composed of two reproducible assets, each...

We offer a new methodology for the assessment of public debt sustainability in a stochastic economy when sovereign default taken into account. The default threshold differs from the no-Ponzi condition and depends on the post-default debt recovery rule. We distinguish sustainability and...

We study the sustainability of pension systems using a life-cycle model with distortionary taxation that sets an upper limit to the real value of tax revenues. This limit implies an endogenous threshold dependency ratio, i.e. a point in the cross-section distribution of the population beyond...

National strategies for sustainable development between Rio 1992 and New York 2015 -- From conventional to sustainable project management in development cooperation -- Evaluation of sustainable development -- From governance to good governance -- Challenges for setting-up effective social...

This paper analyzes the impact of demographic aging on capital accumulation and welfare in economies with unfunded pensions. Using a two-period overlapping generation model with potentially endogenous retirement decisions, it shows that both the type of aging, i.e. declining fertility or...

Foreword / by Christian A. Klöckner -- Citizens and renewable energy : determinants of civic engagement -- Wind energy acceptability, what, how and when : all the variables at stake -- Testing the theory : methods and data collection -- The first community-owned co-operative in the UK : lessons...

Foreword / J. Rotmans -- Prologue / J. Köhler and G. Holtz -- Making it a science : aspirations and hesitations of transitions research / F.J. de Haan -- Modelling and social science : problems and promises / F. Bianchi and F. Squazzoni -- Modelling and multi-level perspective : the MATISSE...