- "The starting point is the amount of wages which the deceased was earning, the ascertainment of which to some extent may depend on the regularity of his employment. Then there is an estimate of how much was required or expended for his own personal and living expenses. The balance will give a datum or basic figure which will generally be turned into a lump sum by taking a certain number of years' purchase. That sum, however, has to be taxed down by having due regard to uncertainties, for instance, that the widow might have again married and thus ceased to be dependent, and other like matters of speculation and doubt."

- "The starting point in any estimate of the amount of the 'dependency' is the annual value of the material benefits provided for the dependants out of the earnings of the deceased at the date of his death. But....there are many factors which might have led to variations up or down in the future. His earnings might have increased and with them the amount provided by him for his dependants. They might have diminished with a recession in trade or he might have had spells of unemployment. As his children grew up and became independent the proportion of his earnings spent on his dependants would have been likely to fall. But in considering the effect to be given in the award of damages to possible variations in the dependency there are two factors to be borne in mind. The first is that the more remote in the future is the anticipated change the less confidence there can be in the chances of its occurring and the smaller the allowance to be made for it in the assessment. The second is that as a matter of the arithmetic of the calculation of present value, the later the change takes place the less will be its effect upon the total award of damages. Thus at interest rates of 4 ½% the present value of an annuity for 20 years of which the first ten years are at $ 100 per annum and the second ten years at $ 200 per annum, is about 12 years' purchase of the arithmetical average annuity of $ 150 per annum, whereas if the first ten years are at $200 per annum and the second ten years at $ 100 per annum the present value is about 14 years' purchase of the arithmetical mean of $ 150 per annum. If therefore the chances of variations in the 'dependency' are to be reflected in the multiplicand of which the years' purchase is the multiplier, variations in the dependency which are not expected to take place until after ten years should have only a relatively small effect in increasing or diminishing the 'dependency' used for the purpose of assessing the damages."

- "98.

- The assessment is split into two parts. The first part comprises damages for the period between death and trial. The multiplicand is multiplied by the number of years which have elapsed between those two dates. Interest at one-half the short-term investment rate is also awarded on that multiplicand. The second part is damages for the period from the trial onwards. For that period, the number of years which have based on the number of years that the expectancy would probably have lasted; central to that calculation is the probable length of the deceased's working life at the date of death."

- "However, the multiplier is a figure considerably less than the number of years taken as the duration of the expectancy. Since the dependants can invest their damages, the lump sum award in respect of future loss must be discounted to reflect their receipt of interest on invested funds, the intention being that the dependants will each year draw interest and some capital (the interest element decreasing and the capital drawings increasing with the passage of years), so that they are compensated each year for their annual loss, and the fund will be exhausted at the age which the court assesses to be the correct age, having regard to all contingencies. The contingencies of life such as illness, disability and unemployment have to be taken into account. Actuarial evidence is admissible, but the courts do not encourage such evidence. The calculation depends on selecting an assumed rate of interest. In practice about 4 or 5 per cent is selected, and inflation is disregarded. It is assumed that the return on fixed interest bearing securities is so much higher than 4 to 5 per cent that rough and ready allowance for inflation is thereby made. The multiplier may be increased where the plaintiff is a high tax payer. The multiplicand is based on the rate of wages at the date of trial. No interest is allowed on the total figure."