"Scientific research" Almanac

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  PREDICTING DEMAND OF BUNDLED TELECOMMUNICATIONS SERVICES USING DISCRETE CHOICE-BASED MODELS

  This study explores consumer choice of bundled telecommunications services and empirically investigates some new possibilities of menu-based choice models for explaining and predicting the share of preferences. It demonstrates how to use menu-based conjoint analysis, aggregate multinomial logit and hierarchical Bayes models in order to estimate ... This study explores consumer choice of bundled telecommunications services and empirically investigates some new possibilities of menu-based choice models for explaining and predicting the share of preferences. It demonstrates how to use menu-based conjoint analysis, aggregate multinomial logit and hierarchical Bayes models in order to estimate part-worth utilities of attributes and price levels of digital telecommunications services for home users. A spreadsheet-based analytical simulation model for predictive analysis of the demand structure for alternative scenarios is composed based on empirical estimates of preferences. Our research purpose is to offer and demonstrate opportunities for optimal planning of product bundles that match the actual and potential customers’ expectations and willingness to pay.

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  STATE AND GUIDELINES FOR IMPROVING THE ENERGY EFFICIENCY OF REAL ESTATE PROPERTIES IN BULGARIA

  The aim of this study is to outline guidelines and recommendations for the implementation of the commitments under the EU directives related to climate change and energy efficiency, contributing to prosperity of the market and its sustainable development based on an empirical study of the state of real estate market in Bulgaria. To achieve the ... The aim of this study is to outline guidelines and recommendations for the implementation of the commitments under the EU directives related to climate change and energy efficiency, contributing to prosperity of the market and its sustainable development based on an empirical study of the state of real estate market in Bulgaria. To achieve the goal the following tasks are defined: clarification of the EU strategy on energy efficiency; outlining the place and role of real estate buildings in the country's economy; the development of a model for professional management of residential real estate buildings as a product provided by real estate agencies, able to foster increased energy efficiency. The main research thesis is that improving energy efficiency in buildings is essential for the stabilization and sustainable development of the real estate market by offering long-term benefits for owners and users of real estate.

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  VOLATILITY OF CORRELATIONS BETWEEN MACROECONOMIC INDICATORS IN THE SYSTEM OF NATIONAL ACCOUNTS (2000-2011)

  This study aims to prove that not only macro indicators, but also the correlations between them should be used as main macroeconomic indicators since being relative quantities they have richer content and create more favourable opportunities for using them in the macroeconomic analysis, modeling and forecasting of socio-economic phenomena and ... This study aims to prove that not only macro indicators, but also the correlations between them should be used as main macroeconomic indicators since being relative quantities they have richer content and create more favourable opportunities for using them in the macroeconomic analysis, modeling and forecasting of socio-economic phenomena and processes. The main purpose of this study is to examine the correlations between macroeconomic indicators which are associated with drops, recovery, upsurge and peaks of economic development. In this context, the object of the study is focused on the volatility of these correlations in the period 2000-2011, and its impact on the country’s economic development. The results prove our thesis and indicate more intense volatility, which is caused by the world economical crisis.