Lowering degree of the contractor's risk aversion and the marginal cost of effort can improve the level of efforts.

降低承包商的风险厌恶程度及其边际努力成本，提高承包商的努力水平。

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DeLarge is eventually jailed for murder, during which time he undergoes an experimental aversion therapy developed by the government in an effort to solve society's crime problem - it causes him to suffer nausea whenever he contemplates an act of violence.

BBC: The history of the future in 10 images