درخت حوزه‌های تخصصی

Modern banks have shifted their function as purely administrative, economic and industrial entities into socio-political institutions that must be sensitive to the surrounding environment. This function has always been neglected. This study was conducted based on primary, secondary, and tertiary data and reviews the full text of 75 studies selected from more than 245 studies. The selected elected papers and studies addressed the following issues: (1) business models, (2) banking business models, (3) sustainability and sustainable development, and (4) business models adopting a sustainable development approach. Investigations on banking business models show that most studies have focused on the categorization of banking activities at the multi-bank level, and finally, using clustering techniques, have provided some general categorization for business models.

Over the past few years, many organizations have come to believe that the brand of their products and services is one of their most valuable assets. Therefore, it must be said that the brand is an asset that has a significant part of the value of the property of institutions and organizations. In this research, the building brand equity (BBE) from the customer's perspective and brand market performance (BMP) have been investigated and identified, selected, eventually reached the operational stage, and then evaluated how the impacts and their relationship with each other resulted in the presentation of a model that the model has been tested in the cosmetics industry in Tehran. The statistical population of this study was all customers of cosmetic products in Tehran city in 2018 who were selected by random cluster sampling method. A sample of 550 customers from ten brands, which has about 80% of the market share, was selected. In this research, the obtained data were collected through a questionnaire as well as secondary information and then tested using structural equation modeling and focal correlation analysis. Finally, all proposed structures of the research were confirmed after analyzing the factor. According to the path analysis conducted at the customer level, only two hypotheses were not approved. At the brand level, all four hypotheses were confirmed by the focal correlation analysis. Based on the findings of the research, the proposed model was confirmed by the researcher and practical and research suggestions were submitted for managers and researchers.

In the first nine months of 2018, the triple increase of dollar price made the stock market an attractive place for speculation, especially for non-professional investors. Hence, this study was aimed to investigate the profitability of speculation in the foreign exchange market (dollar) and to compare it with investment in three indices of sugar, oil products, and basic metals. First, the conditional Sharpe ratio was calculated separately for these four assets. Then, six investment portfolios were developed for these four assets. The results showed although dollar speculation with mean daily return of 0.6% had the highest return among the ten investment assets, dollar speculation was ranked last, or tenth (0.096) in terms of performance and profitability by considering the standard deviation or daily conditional risk using conditional Sharpe ratio. Moreover, the results indicated that from among the six portfolios with equal weight, three investment portfolios consisting of merely Tehran Stock Exchange indices had a better performance than three investment portfolios comprising dollar speculation and each stock exchange index. It was also found that the risk of lack of capital diversification by investors was higher than that of accepting a higher-level risk.