What is the test for assessing future earning capacity of a plaintiff in a personal injury case?

The trial judge, as I have said, referred to the judgment of Mr. Justice Finch in Brown v. Golaiy. Future loss of earning capacity was at issue in that case. It stemmed from quite a different type of injury than the injury sustained by the plaintiff in the case at bar. But I think the considerations referred to by Mr. Justice Finch at p. 4 of his reasons have application in cases where loss of future earning capacity is in issue. I refer to this language at p. 4 of Mr. Justice Finch's judgment: 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.