This study is carried out to verify that the motor insurance group rating system by car model would restrain from decreasing the consumer's surplus in the car market, and to propose enhanced measures on the group rating system in order to minimize the...
This study is carried out to verify that the motor insurance group rating system by car model would restrain from decreasing the consumer's surplus in the car market, and to propose enhanced measures on the group rating system in order to minimize the loss of consumer's surplus.
Above all, This study presumes the loss of consumer's surplus arising from the domestic car market, especially automobile parts market, utilizing "Harberger's model". Also this paper analyzes the effect in the automobile parts market with respect to the implementation of the motor insurance group rating system of collision coverage introduced in 2007. Through a "Paired T Test”, changes to automobile parts cost before & after the adoption of group rating system, and some differences of repair cost by car model according to the low speed crash tests are confirmed. Besides, this study proves that the group rating system plays an affirmative role in the real world market as by analysing insurance payment claim data by car model.
In order to minimize the loss of consumer's surplus, it is proven necessary to calculate the physical damage coverage rate-making system on the basis of repair cost, not car price, according to the multi-variate regression analysis of several variables. Also suggested is that there is a possibility to implement the adoption of the group rating system on the third party liability & medical payments coverage resulting from the insurance claim data analysis by car model.
As stated, it is possible to differentiate the insurance premium for the liability coverage of motor insurance according to the claim loss data by car model. As for new cars without any claim data, it would be possible to adopt the group rating system by evaluating the level of threat of the 2nd party car. However, as there is no such a system in place, applying the car's weight, max speed, etc. as a measure of evaluating the level of threat would be an alternative. In the case of expanded medical payments coverage, a positive correlation was found between vehicle safety evaluation results obtained through collision tests and insurance loss data. However, a relatively low correlation was found for loss results in terms of personal loss coverage where the possibility of moral hazard is high. Examples of personal loss coverage include bodily injury liability and expanded medical payments coverage.
To minimize the loss of consumer’s surplus, first, improvements should be made to the group rating system by model for physical damage coverage and it should be extended to property damage liability coverage. Also, additional improvements are necessary such as analyzing the correlation between vehicle specifications and loss data with greater precision by increasing the volume of data for personal loss coverage including bodily injury liability and expanded medical payments coverage.
Meanwhile, it is necessary to measure the traffic accident mitigation effects brought by primary safety equipment such as Autonomous Emergency Braking (AEB), and Lane Departure Warning (LDW). These aforementioned systems have been researched actively overseas based on expectations that they will have a substantial impact on decreasing the accident rate. It is also necessary to prepare premium discount methods through such research on primary safety systems to induce more owners into installing them on their vehicles.