In order to study the dynamic changes in gas concentration, to reduce gas hazards, and to protect and improve mining safety, a new method is proposed to predict gas concentration. The method is based on the opposite degree algorithm. Priori and posteriori values, opposite degree computation,...

In order to study the dynamic changes in gas concentration, to reduce gas hazards, and to protect and improve mining safety, a new method is proposed to predict gas concentration. The method is based on the opposite degree algorithm. Priori and posteriori values, opposite degree computation,...

The year 2015 is the "finish line" for the Millennium Development Goals (MDGs). What should the post-2015 goals look like for Africa? The goal of ending extreme poverty remains paramount. Globally, the World Bank has set goals to end extreme poverty by 2030 and to promote shared prosperity in...

This paper characterizes the optimal tax and expenditure policies in economies where households’ unobservable gross earnings depend on exogenous (or inherited) capabilities and input investments. In a two-class economy, optimal redistribution relies on non-linear income taxation and input...

The year 2015 is the "finish line" for the Millennium Development Goals (MDGs). What should the post-2015 goals look like for Africa? The goal of ending extreme poverty remains paramount. Globally, the World Bank has set goals to end extreme poverty by 2030 and to promote shared prosperity in...

With the year 2015 – the MDG finishing line – approaching, post-2015 goals as they impact Africa need to be firmed. The goal of ending extreme poverty remains paramount. Globally, the World Bank set goals to end extreme poverty by 2030 and to promote shared prosperity in every society. We...