What is the test for assessing the value of a person who has been injured in a motor vehicle accident?

In Kwei at para. 13, Mr. Justice Taggart adopted the criteria articulated by Finch J., as he then was, in Brown v. Golaiy at para. 8: The means by which the value of the lost, or impaired, asset is to be assessed varies of course from case to case. Some of the considerations to take into account in making that assessment include whether: 1. The plaintiff has been rendered less capable overall from earning income from all types of employment; 2. The plaintiff is less marketable or attractive as an employee to potential employers; 3. The plaintiff has lost the ability to take advantage of all job opportunities which might otherwise have been open to him, had he not been injured; and 4. The plaintiff is less valuable to himself as a person capable of earning income in a competitive labour market.