The [name withheld] v [name withheld] approach to assessing lost earning capacity by reference to the full cost of substitute labour or the whole of partnership income applies only where the plaintiff's personal exertions are effectively the primary source of the partnership's income, the partnership is terminable at will, and the plaintiff has effective control over the deployment of earning capacity. Where the plaintiff's contribution is primarily to the expenditure side of the business (e.g., administrative tasks) and another partner is the primary income generator, the appropriate measure is the plaintiff's share of the cost of replacement labour. An error in one component of a damages assessment (here, non-pecuniary loss assessed at 30% rather than 25%) does not warrant appellate interference where the total award remains within the limits of a sound discretionary judgment.
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