The limits of parametric reforms in sustaining the Algerian retirement system in a context of population ageing

Accelerated population ageing in Algeria threatens the financial sustainability of its pay-as-you-go retirement system. Reform is a necessity, with options ranging from simple parametric reforms to important systemic changes. Prior to undertaking systemic reforms, it is worthwhile to investigate whether parametric reforms can place the system on a financially sustainable footing. In this article, we used a multi-scenario analysis that crosses the possible reform actions with possible socioeconomic scenarios. The results show that when using the most favourable scenarios, the financial balance of the Algerian system will remain negative in the short and long term. Implementing major parametric reforms can only help reduce the deficit and make it stable over time. Thereafter, systemic reforms will have to be implemented.     

Accuracy of Numerical Solutions Using the Euler Equation Residuals

This paper is concerned with asymptotic properties on the accuracy of numerical solutions. It is shown that the approximation error of the policy function is of the same order of magnitude as the size of the Euler equation residuals. Moreover, for bounding this approximation error the most relevant parameters are the discount factor and the curvature of the return function. These findings provide theoretical foundations for the construction of tests to assess the performance of alternative computational methods.     

巷道瓦斯爆炸二次反冲的数值模拟

通过建立瓦斯爆炸流场的数学模型，运用ＴＶＤ（ｔｏｔａｌ ｖａｒｉａｔｉｏｎ ｄｉｍｉｎｉｓｈｉｎｇ）格式的有限差分方法，模拟了瓦斯爆炸冲击波峰值超压沿井巷的衰减规律，着重反映了冲击波二次反冲过程，其结果对于实际防爆工程设计具有指导意义。