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SDR = WAM = (a)SOC + (1-a)SRTP; where; a = proportion of government project cost funded from current private investment and 1-a = proportion of project cost funded from current consumption. If a > 0, WAM will lie between SOC and SRTP [ SOC > WAM > SRTP].

## How do you determine reasonable discount rate?

Discount Rates in Practice

In other words, the discount rate should equal the level of return that similar stabilized investments are currently yielding. If we know that the cash-on-cash return for the next best investment (opportunity cost) is 8%, then we should use a discount rate of 8%.

## What is the Ramsey formula?

In words, the Ramsey equation says that along the optimal path, the rate of return from saving (and so deferring consumption) has to equal the rate of return to consumption. … The equation provides a necessary condition for consumption to be smoothed optimally across time periods.

## What are the three types of discount rate?

There are 3 Types of Discount;

- Trade discount,
- Quantity discount, and.
- Cash discount.

## How do you calculate discount factor in Excel?

Discount Factor = 1 / (1 * (1 + Discount Rate)^{Period}^{Number})

- Discount Factor = 1 / (1 * (1 + 10%) ^ 2)
- Discount Factor = 0.83.

## What is an example of discount rate?

In this context of DCF analysis, the discount rate refers to the interest rate used to determine the present value. For example, $100 invested today in a savings scheme that offers a 10% interest rate will grow to $110.

The use of a high discount rate implies that people put less weight on the future and therefore that less investment is needed now to guard against future costs. … The use of a low discount rate supports the view that we should act now to protect future generations from climate change impacts.

## Why Ramsey rule may be called inegalitarian?

It seems that Ramsey rule requires luxury goods with generally high price elasticities are to be taxed at lower rates and necessities with low elasticities are to be taxed at higher rates. This way of taxation is inegalitarian as the poor consume more of necessities and less of luxury goods and vice versa for the rich.

## What is the pure rate of time preference?

19 The pure rate of time preference is a kind of discount rate; a positive value for it means that future benefits (respectively, costs) are to be counted less than the present, and even less the further in the future they are. It is a pure discount rate. However, it is not the only kind of discount rate.

## How do you calculate a discount?

The formula to calculate the discount rate is: Discount % = (Discount/List Price) × 100.

## How do you determine the discount rate for NPV?

It’s the rate of return that the investors expect or the cost of borrowing money. If shareholders expect a 12% return, that is the discount rate the company will use to calculate NPV. If the firm pays 4% interest on its debt, then it may use that figure as the discount rate.

## How do you calculate discount rate for NPV in Excel?

How to Use the NPV Formula in Excel

- =NPV(discount rate, series of cash flow)
- Step 1: Set a discount rate in a cell.
- Step 2: Establish a series of cash flows (must be in consecutive cells).
- Step 3: Type “=NPV(“ and select the discount rate “,” then select the cash flow cells and “)”.