This finding is in line with Lampaert and Walhin (2005).
The cover that combines quota-share and surplus reinsurance is preferred in reducing the risk of retained claims in insurance portfolios with variable insurer risk retention levels (e.g., Income Protection).
However,quota-share and surplus reinsurance arrangement is never optimal in maximizing insurer returns as it is more expensive that quota-share and always requires sharing every insurance risk due to quota-share component in the arrangement.