<p>Internationally most Internet trade related payments are performed with the use of a credit card based payment system on the Internet. Payment against invoice is still most common when trading over the Internet in Sweden. The security development, comfort and timesaving indicate that credit card based payment systems on the Internet soon will have a breakthrough in Sweden as well. The Swedish legislation concerning payment is neither especially extensive nor suited to electronic payments but to payments performed with notes and coins. When the legal effects, of a payment performed with a credit card based payment system on the Internet, set in is not fixed. My objective with this essay is to analyse when the legal act payment should be considered to have been realized, when the payment is performed with the use of a credit card based payment system on the Internet</p>

Internationally most Internet trade related payments are performed with the use of a credit card based payment system on the Internet. Payment against invoice is still most common when trading over the Internet in Sweden. The security development, comfort and timesaving indicate that credit card based payment systems on the Internet soon will have a breakthrough in Sweden as well. The Swedish legislation concerning payment is neither especially extensive nor suited to electronic payments but to payments performed with notes and coins. When the legal effects, of a payment performed with a credit card based payment system on the Internet, set in is not fixed. My objective with this essay is to analyse when the legal act payment should be considered to have been realized, when the payment is performed with the use of a credit card based payment system on the Internet

This study intends to investigate the role of credit card commercials in the integration of credit cards to the Turkish society and how this integration has affected the concept of consumption in Turkey. While presenting credit cards to the society, commercials establish certain kinds of relationships between people and credit cards, as well as between people and the other commodities in the market. In this respect, they attempt to rationalize the use of credit cards and to get social approval in order to widen credit card spending among society. Exploring the ways commercials attempt to lay the ground for credit card purchasing, the research focuses on the inversion of established values in the Turkish society related with consumption. In this frame, 210 credit card commercials broadcasted on TV over an eight year period are selected and examined through the combined semiological and content analysis. The outcome of the research unveils the role of credit card commercials in the transformation of the idea of consumption in Turkey. In this sense, research demonstrates the socio-cultural affect of commercials in the society.

One of the issues facing credit card fraud detection systems is that a significant percentage of transactions labeled as fraudulent are in fact legitimate. These “false alarms” delay the detection of fraudulent transactions. Analysis of 11 months of credit card transaction data from a major Canadian bank was conducted to determine savings improvements that can be achieved by identifying truly fraudulent transactions. A meta-classifier model was used in this research. This model consists of 3 base classifiers constructed using the k-nearest neighbour, decision tree, and naïve Bayesian algorithms. The naïve Bayesian algorithm was also used as the meta-level algorithm to combine the base classifier predictions to produce the final classifier. Results from this research show that when a meta-classifier was deployed in series with the Bank’s existing fraud detection algorithm a 24% to 34% performance improvement was achieved resulting in $1.8 to $2.6 million cost savings per year.

One of the issues facing credit card fraud detection systems is that a significant percentage of transactions labeled as fraudulent are in fact legitimate. These “false alarms” delay the detection of fraudulent transactions. Analysis of 11 months of credit card transaction data from a major Canadian bank was conducted to determine savings improvements that can be achieved by identifying truly fraudulent transactions. A meta-classifier model was used in this research. This model consists of 3 base classifiers constructed using the k-nearest neighbour, decision tree, and naïve Bayesian algorithms. The naïve Bayesian algorithm was also used as the meta-level algorithm to combine the base classifier predictions to produce the final classifier. Results from this research show that when a meta-classifier was deployed in series with the Bank’s existing fraud detection algorithm a 24% to 34% performance improvement was achieved resulting in $1.8 to $2.6 million cost savings per year.

[pt] O mercado de cartão de crédito no Brasil cresce ano após ano e as formas de utilização dos cartões também estão se modificando com o passar do tempo. Na atualidade, o cartão de crédito se tornou um meio de pagamento capaz de multiplicar a capacidade financeira de seu usuário, ou seja, se tornou um instrumento de alavancagem financeira. Dentro deste contexto, os estudantes universitários são um nicho extremamente atraente para a indústria dos cartões de crédito. Este estudo piloto objetivou elaborar um questionário para avaliar as variáveis determinantes do endividamento de estudantes universitários no cartão de crédito, adaptando a literatura estrangeira para a realidade do mercado de cartão de crédito brasileiro. O questionário elaborado foi aplicado em seis diferentes universidades no estado do Rio de Janeiro, no Brasil, e resultou em uma amostra de trinta e dois estudantes. Os dados coletados foram tabulados e tratados estatisticamente através do método de regressão linear múltipla. Os resultados apontaram que apenas uma das variáveis independentes elencadas teve significado estatístico e pode ser considerada como preditora do grau de alavancagem financeira dos estudantes. Esta variável foi o meio de pagamento de preferência. Em resumo, os estudantes que declararam preferir o cartão de crédito como meio de pagamento de preferência apresentaram maiores níveis de endividamento. / [en] The credit card market in Brazil is growing year after year and the way to use the cards is also changing over the time. Currently, the credit card has become a payment method which can multiply the financial capacity of its holder, in other words, it became an instrument of financial leverage. In this context, college students are a very attractive niche for the credit card industry. This initial study aimed to develop a questionnaire to evaluate the determinant variables of college student`s indebtedness in credit cards by adapting the foreign literature to the Brazilian credit card market reality. The questionnaire developed was distributed to students of six different colleges in the State of Rio de Janeiro, in Brazil, and resulted in a sample of thirty-two students. The collected data were tabulated and statistically treated by the multiple linear regression method. The results showed that only one of the independent variables listed was statistically significant and could be considered a predictor of the degree of financial leverage of the students. This variable was the preferred payment method. In short, students who expressed the preference for credit cards as a payment method had higher levels of indebtedness.

O avanço no uso do cartão de crédito e sua função como instrumento de crédito afetou o padrão de consumo das famílias. O presente trabalho pretende analisar como alterações no limite de crédito e na taxa de juros do cartão de crédito afetam o consumo. A partir dos resultados obtidos com esta primeira análise, podemos verificar a validade das predições das Teorias de Consumo, como a Teoria de Renda Permanente / The advance in the credit card usage and its function as a means of credit affects the consumption of the families. This work intend to analyze how modifications in the limit and interest rate of the credit card affects their consumption. From the results obtained with this first analysis , we may verify the validity of the predictions of the Consumption Theories, as the Permanent Income Theory

Esta dissertação de mestrado tem como objetivo, elaborar um modelo de segmentação baseando-se no comportamento comprovado de consumo de clientes, valendo-se das técnicas de Análise de Associação e Análise de Cesto de Compras, aplicadas aos dados das faturas de cartão de crédito dos clientes. A partir do modelo proposto, testou-se a previsibilidade das próximas transações dos clientes por meio de uma amostra de validação. A motivação desta pesquisa provém de três pilares: Contexto Científico, Tecnológico e Mercadológico. No Contexto Científico, apesar de já terem sido publicados artigos que associam a utilização do cartão de crédito a perfis de segmentação de clientes, não se encontram publicados estudos que relacionam dados da própria utilização do cartão como fonte de informação do cliente. A razão mais provável para isso é a dificuldade no levantamento dos dados fundamentais para este tipo de pesquisa. Com o apoio de uma grande instituição financeira, este trabalho está se tornando viável, sob o preceito da análise apenas sobre bases de clientes anônimos e que não transpareça informações estratégicas da instituição. No contexto tecnológico, com a tecnologia de informação em crescente desenvolvimento, as operações feitas com cartão de crédito tem o processamento on-line em tempo real, promovendo a troca de informação entre o estabelecimento comercial e a instituição emissora do cartão de crédito no momento em que a cobrança é lançada e aceita pelo consumidor final. Isso possibilita que ações promocionais sejam realizadas em toda a cadeia de valor de cartões de crédito, gerando mais valor para os clientes e empresas. No contexto mercadológico, o Brasil apresentou altas taxas de crescimento do mercado de cartões de crédito nas últimas décadas, substituindo os outros meios mais antigos de pagamento e de crediário. Especialmente no Brasil, observam-se compras pagas com o uso do cartão de crédito parceladas com e sem juros, o que contribui para a substituição de outras formas de crédito. Como benefício deste trabalho, concluiu-se que a partir do conhecimento do consumo do cliente, pode-se aplicar a análise de cesto de compras para prever as próximas transações dos clientes, a fim de segmentar os clientes para estimulá-los a aderir a uma determinada oferta. / The objective of this research is elaborating a Segmentation Model based on credit card client\'s behavior using Link Analysis and Market Basket Analysis techniques. The proposed model was used to testing the predictability of next client transactions through validation sample. Scientific, technological and marketing scenarios are the three motivational pillars of this research. On scientific context there were published studies that associate credit card use with segmentation profile of customer. However these studies do not establish relationship between data from own clients credit card utilization. One probably reason for this lack analysis into studies is the difficult collect of fundamental data. This research was feasible with the support of a great Brazilian financial group. On technological context is observed a wide information technology development. Credit cards transactions have on-line processing. This scenario allows exchange information between market and credit card institution at the moment of final client transaction approval. This technology permits that actions be realized along credit card value chain based on transactions that have been made. On marketing context, during the latest decades, Brazil has shown large growth rates on credit card beyond older ways of payment. In Brazil, is observed a wide utilization of credit cards in installment purchases contributing for the replacement of other ways of credits. This research conclude that from the knowledge of client consume profile, using the Market Basket Analysis technique, it is possible to get a forecast of purchase transactions with the objective to stimulate the consumer in accept particular offer.

A crescente utilização de cartões de crédito, nas últimas décadas do século XX, exigiu adequação do varejo a esse novo meio de pagamento, promovendo uma mudança no relacionamento com seus clientes. Este trabalho analisa o processo de decisão estratégica entre duas organizações, banco e varejista, na implantação de uma operação de cartão de crédito de marca própria, com base em um estudo de multicaso, com enfoque qualitativo, que permitiu aprofundamento e detalhamento do processo decisório em duas empresas de porte similar do setor supermercadista da região sudeste do país: o Sonda Supermercados, em São Paulo e a Rede Prezunic, no Rio de Janeiro. A obtenção dos dados foi realizada através de entrevistas semiestruturadas e da análise de documentos. Os resultados mostram que empresas, frente a um mesmo objetivo, tomam decisões de maneiras diferentes. Sendo assim, a decisão estratégica em implantar uma operação de cartão de crédito de marca própria deve ser tratada considerando-se o processo de decisão que melhor se adequa as características da organização e tomadores de decisão, para a garantia de um resultado satisfatório. Os resultados obtidos contribuem àquelas empresas que pretendem implantar uma operação de cartão de crédito de marca própria e auxiliar aos futuros interessados a conhecerem a importância e os impactos que essa decisão carrega. / The increase in use of credit cards, in recent decades of the twentieth century, demanded the adequacy of the retail sector in means of payment forms, promoting a change in the relationship with their customers. This study presents the strategic decision process between two organizations, in the banking and retail sectors, on the deployment of a private label credit card operation, based on two case studies on companies of similar size in the supermarket business in the southeast region of the country: Sonda, in Sao Paulo and Prezunic, in Rio de Janeiro. For obtaining the data, different techniques such as semi-structured interviews and the examination of documents were used. Results show that companies, facing the same goal, make decisions in different ways. Therefore, the strategic decision process to deploy a private label credit card operation should be dealt considered the characteristics of the organization and decision-makers, ensuring a satisfactory result. The purpose of this study is to guide future decision-making processes by presenting the importance and the impact that this decision carries.

Smartphones are often used in order to make purchases today and mobile payments are estimated to continue growing in numbers the following years. This makes mobile payment systems attractive to companies as a new business platform. It also increases the number of malicious users trying to exploit the systems for financial gain. This thesis is conducted for the company TaxiCaller which desires to integrate mobile payments into their existing service. It discusses the current security standards for mobile payments and evaluates existing mobile payment solutions. The focus of the evaluation is on the security of the solutions and vulnerabilities, as well as mitigations of identified vulnerabilities, are discussed. Based on the evaluation, a mobile payment solution is designed and implemented. This system fully integrates with TaxiCaller’s existing system. A threat analysis of the implemented mobile payment solution is performed to provide confidence in the security. This thesis also provides an insight into the ecosystem of mobile payments including the stakeholders, the regulations, the security standards and difficulties during implementations.