Многопродуктовая модельная декомпозиция компонент валового внутреннего продукта России
The paper proposes methods of multiproduct decomposition components of GDP by use, allows the use of macroeconomic models several different price indices. The main distinguishing feature of the proposed decomposition is the lack of reference to the export or import, which solves the problem of incompatibility of the final system of equations and removes the restrictions on the behavior of export and import deflators. A theoretical basis for the procedures is provided, the method of calculating on the statistical data is described and the results of the procedure of decomposition on data on the components of Russia's GDP is presented. The resulting two-product decomposition is valuable not only as an intermediate step in the construction of macroeconomic models, but also allows a number of conclusions about the behavior of macroeconomic agents. The paper also provides a method of decomposition of changes in inventories, which, because of the nature of this indicator in economic models, are usually ignored.
This is the first paper on consumer search where the cost of going back to stores already searched is explicitly taken into account. We show that the optimal sequential search rule under costly second visits is very different from the traditional reservation price rule in that it is nonstationary and not independent of previously sampled prices. We explore the implications of costly second visits on market equilibrium in two celebrated search models. In the Wolinsky model some consumers search beyond the first firm and in this class of models costly second visits do make a substantive difference: equilibrium prices under costly second visits can both be higher and lower than their perfect recall analogues. In the oligopoly search model of Stahl where consumers do not search beyond the first firm, there remains a unique symmetric equilibrium that has firms use pricing strategies that are identical to the perfect recall case.
In this article we describe a system allowing companies to organize an efficient inventory management with 40 suppliers of different products. The system consists of four modules, each of which can be improved: demand planning, inventory management, procurement planning and KPI reporting. Described system was implemented in a real company, specializing on perishable products totaling over 600 SKUs. The system helped the company to increase its turnover by 7% while keeping the same level of services.