Tax and benefits

Ashwin was responsible for the Department for Work and Pension's Policy Simulation Model, used to estimate the expenditure and policy effects of all tax and benefits policy.  The model was the department's tool for estimating who was likely to be affected by tax and benefit changes, and by how much.  It was used during preparations for each year's budget to predict the likely impact of policies on child poverty and how much the changes were likely to cost or save. 

Liverpool Economics has recently carried out work for the Institute of Public Policy Research on their model for estimating the effects of tax and benefit policies.

Pensim2
Ashwin was responsible for building Pensim2, the government's long-range model for predicting pensioner incomes.  This forms a crucial part in estimating the long-term expenditure effects of pensions policy

The expenses of government, having for their object the interest of all, should be borne by everyone, and the more a man enjoys the advantages of society, the more he ought to hold himself honoured in contributing to those expenses.

Anne-Robert-Jacques Turgot