However, social mobile analysis is a good method to research what the main factors which can influence passengers to either choose to catch MTR or choose other transportation tools, such as bus, tram, train, ferry, taxi etc. Some consumption psychologists had using a data set involving on adults ( 26 couples) living in a community for over a year to find that social behavior measured via face-to-face interaction, call and SMS logs, which can be used to predict the spending behavior to explore diverse business because loyal customers and overspend. Their results showed the mobile phone bases social interaction patterns can provide more predictive power on spending behavior than personality based features. Interestingly, these consumption psychologists found that more social couples also tend to overspend. Obtaining such insights about couple level spending behavior via novel social-computing frameworks can be of vital importance to economists, marketing professional and policy markers. The basic idea is that a person's attitudes and behaviors are influenced by several levels of society, such as culture, subculture, social classes, reference groups and face-to-face groups. Such as any passenger's transportation tools choice, which are also influenced by culture, subculture, social classes, near transportation tool place, transportion cost, transportation time schedule and transportation service etc. factors. In Special finally, some consumption psychologists investigated whether the social behavior measured via face-to-face interactions, call and SMS logs can be used to predict the spending behavior for couples in terms of their propensity to explore diverse businesses, engage frequently with them and overspend. Their findings not only motivate in potentially new line of investigation into a spending behavior via mobile sensing, but also demonstrate the feasibility of passive ( i.e. which don't require active user attention ) method, for undertaking similar studies at a large scale in near future.In recent years, mobile sensing and reality approaches have been used to understand multiple aspects of human behavior. Insights on a behavioral level ( e.g. overspending, loyalty and diversity) have much longer term validity and can explain certain aspects of human behavior. To study spending behavior of couples, the consumption psychologists focus on three important behavior: exploration, loyalty and overspending behavior. The aim is to identify the couples that tend to explore diverse business, engages repeatedly and frequently with certain businesses and (or) spend higher amounts of income to them. For exploration, who calculated the diversity in vendors frequented. The exact method for calculating diversity scores is explained in the next section. For loyalty, who considered how frequently couples engage with their favorite businesses. Specifically, they calculated the percentage of transactions ( out of a couple's total transactions), that were made at their top businesses. Lastly, to quantify overspending, they calculated the ratio of the amount of money spent by a couple to their self-declared discretionary spending budget. Hence MTR can use mobile to enquire what are the general expectation to any passengers in order to predict the reasons why who prefer to choose other transporation tools more accurate.