Purpose Customer education is considered as an appropriate communication strategy for promoting green products. This paper aims to elaborate on the characteristics of customer education that are suitable for green products by identifying what messages must be delivered, sources and channels that must be used to achieve the greatest effect. Moreover, this study uses a repeated cross-sectional approach by using the same research model in 2008 and 2019. Design/methodology/approach A questionnaire was arranged based on the research model. In 2008, the data were collected at 12 shopping malls in Jakarta. The 2019 data were collected online, using Google forms, from citizens of Jakarta and five nearby cities. Then, the data were processed using structural equation modeling. Findings Data analysis of both years shows that education containing messages that are both informational and transformational can increase customers’ perceptions of the benefits and economic accessibility of green products, as well as environmental concerns. This study’s results also indicate that customers’ intentions to buy green products are influenced by their attitudes toward buying. However, the impact of customers’ perceptions of benefit and economic accessibility on their attitudes toward green purchasing varied between 2008 and 2019. Practical implications Sustainable consumption can be pursued through customer education once a community’s economic conditions have reached a certain level. This study shows how changes have unfolded in Indonesia in several areas, therefore it should also be necessary to pursue green behavior via policies that are tailored to changes in the community. Social implications This study shows how changes have unfolded in Indonesia in several areas, therefore it should also be necessary to pursue green behavior via policies that are tailored to changes in the community. Originality/value Investigation of the role of customer education in green products using a repeated cross-sectional study.

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In this paper, we present the relation between idiosyncratic risk and Indonesia's stock performance using asset pricing models. We use a unique data set containing daily returns of 80 Indonesia equity of KOMPAS100 index on a 7-year period to measure stock performance. We formed portfolios based on market capitalization and book to market value. We found that idiosyncratic risk positively correlates with the excess stock return, specifically in the portfolio of secondtier Size and portfolio with highest and lowest book to market value.

The issue of claim reserves on insurance companies is one that insurance businesses need to cope with. The availability of such reserves within a company is fundamental for them to maintain their business activities. They are also required in precise calculations regarding the allocation of funds owned by the company based on the sale of products issued, in order to generate profits. Based on the limitations of the traditional models, this paper intends to introduce an alternative model for estimating claim reserves, called the quantile regression model. According to Chan (2015), the quantile regression model is considered to have the ability to calculate claim reserves against data with heterogeneous variance and with no clear distribution, which is mostly insurance data known for. The main purpose of the research is to attempt to calculate an estimation for claim reserves by adopting the quantile regression model, and to observe whether the model can be applied to the context of the XYZ insurance company in Indonesia. The data used in the research are the claims data of XYZ company for motor vehicle insurance products from 2013 to 2015.

Unit-linked endowment insurance with a minimum guarantee not only provides life protection to customers until the end of the insurance contract period but also provides investment protection, especially stock investments that have high returns and high investment risks, so call options are needed to protect investments. This study discusses premiums' calculation along with the caps and floor limits of premiums on unit-linked endowment insurance products with minimum guarantees using Monte Carlo simulations with stochastic and continuous model and numerical methods. Unit-linked insurance with stock investment and mortality tables in this study shows that in addition to gender, the customer's initial age has a policy, insurance contract, and amount minimum guarantee, the caps and floor limits of the premium are influenced by the proportion of investment from the premium. The interval between the caps and floor limits of the premium is more comprehensive if the premium's investment proportion is small so that the insurance company can use the caps limits of the premium.