We study semiparametric two-step estimators which have the same structure as parametric doubly robust estimators in their second step, but retain a fully nonparametric specification in the first step. Such estimators exist in many economic applications, including a wide range of missing data and...

Simulations can be an appropriate tool in the determination of cost-optimal ordering and delivery requirements considering medium and long-term manipulable constraints. Against the background of sustainable supply chain management increasingly relevant environmental factors can be taken into...

We develop an approach for making welfare comparisons between populations with multidimensional discrete well-being indicators observed at the micro level. The approach is rooted in the concept of multidimensional first order dominance. It assumes that, for each indicator, the levels can be...

The economy and society of Tajikistan depends strongly on agriculture. Approximately three-quarters of the Tajik population live in rural areas. The agricultural sector generates about one fifth of total GDP and provides 55 per cent of employment (Akramov and Shreedhar, 2012). However, this does...

The purchasing performance measurement challenge -- Purchasing performance measurement at the level of commodity groups -- Excursus : concepts for increasing purchasing performance in corporate practice -- Purchasing performance measurement on the procurement organization level -- Supplier...

This paper analyzes the interaction between price and inventory decisions in an oligopoly industry and its implications for the dynamics of prices. The work extends existing literature and especially the work of Hall and Rust (2007) to endogenous prices and strategic oligopoly competition. We...

In manual order picking systems, order pickers walk or drive through a distribution warehouse in order to collect items which are requested by (internal or external) customers. In order to perform these operations efficiently, it is usually required that customer orders are combined into (more...

The financial crisis is a crisis of governance as well. In search of answers and solutions many scholars and practitioners recommend improved output control, i.e. better external incentives or even stricter regulations. Monasteries demonstrate that alternative models may be more suitable to...