Evaluation indicators usually adopt the following items:
(A) economic benefit indicators
1. Net appreciation of national income and national net income
It is a static absolute benefit index reflecting the contribution of the evaluation object to the country, and its expression is
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Among them: value-added tax is the net value-added of national income in t years; Pt is the net income of the country in t years; Wt is the salary of the t year; T is the year of evaluation period, t= 1, 2, 3, …, n.
National net income includes tax, net profit and domestic loan interest. This expression is
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Among them: Pt is the national net income of the T year; POt is the output value (total social output value) of t years; MIt is the input value of t years, excluding depreciation, working capital interest, wages and welfare funds; Jt is the investment for T years, including the loan interest during the construction period; Wt is the salary of the t year; RPt is the capital flowing abroad in T year; T is the evaluation period year t= 1, 2, 3, …, n.
Substituting the formula (9-45) into the formula (9-46) is obtained.
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The above formula is a general expression for calculating the net value-added of national income according to the production method.
2. Present value of net appreciation of national income
The present value of net appreciation of national income is the sum of the present value of net appreciation of national income in each year converted into a certain reference year according to a certain social discount rate, and its calculation formula is as follows:
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Where: at is the discount coefficient obtained under the social discount rate (r) of t years, at = (1+r)-t; Other symbols have the same meanings as before.
The net appreciation of national income is a dynamic indicator.
3. Present value of national net income
The present value of national net income belongs to the dynamic absolute income index, which is the sum of the present value of a reference year converted from the national net income of each year according to a certain social discount rate. The calculation formula is as follows:
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The symbols in the formula have the same meaning as before.
4. Net appreciation rate of investment national income
The net appreciation rate of investment national income refers to the ratio of the net appreciation of national income created in normal years of deposit development period to the total investment in deposit exploration and development, and its calculation formula is:
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Where: j is the total investment in exploration and development of the deposit; Ec is the net appreciation rate of national income; VA is the net appreciation of national income.
This indicator is a static relative benefit indicator, which shows that the net value-added of national income created by unit investment is mostly used for the comparison of different projects and programs.
5. Net rate of return of the investing country
The national net rate of return (EP) of investment refers to the ratio of the national net income (P) created in normal years of deposit development to the total investment (J) of deposit exploration and development. Its calculation formula is:
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This index belongs to the relative benefit index.
6. Present value ratio of net appreciation of investment national income
The present value ratio of net appreciation of national income (PEc) is the ratio of present value of net appreciation of national income (PVA) to present value of total investment in mineral exploration and development (PJ). Dynamic relative benefit index reflecting the contribution of unit investment to national economy. Its calculation formula is
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7. The present value ratio of net income of the investing country (PEP)
It is the ratio of net income present value (PP) to total investment present value (PJ) of China residents in mineral exploration and development, and it is also a dynamic relative benefit index. Its calculation formula is:
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The analysis of net added value of national income includes absolute effect analysis and relative effect analysis. The former is called screening evaluation and the latter is called queuing evaluation.
When evaluating the absolute effect of net appreciation of national income, if the sum of net appreciation of national income is greater than zero, then:
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It shows that the investment project has reached the required social discount rate. After the completion of the project, it will contribute to the development of the national economy before the project can be established.
8. National rate of return (or social rate of return)
National rate of return is the discount rate that the sum of the present value of national income (social surplus) calculated by adjusting the price and exchange rate is equal to zero, that is
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When the discount rate R. where: POt is the output value of T years (that is, the total social output value); MIt is the input value of T, excluding depreciation, working capital interest, salary and employee welfare fund; Jt is the investment of T years, including the loan interest during the construction period, and Wt is the salary of T years; RPt refers to the capital flowing into foreign countries in T year, including foreign loan interest, foreign equity and interest, and foreigners' wages; T is the year of evaluation period, t= 1, 2, 3, …, n; R is the discount rate.
National income or social rate of return can be calculated by interpolation. This index belongs to the dynamic relative benefit index.
9. Net foreign exchange effect
The net foreign exchange effect is an important indicator related to foreign projects. When the evaluation project is related to foreign investment and foreign trade, and the mineral products can be exported or the import volume is reduced, the net exchange rate effect should be calculated.
Net foreign exchange effect refers to the present value of the difference between foreign exchange inflow and outflow, that is, the present value of foreign exchange flow. Foreign exchange inflow includes the sales income of export products, which can replace the foreign exchange value saved by imports, foreign exchange loans and state equity. Foreign exchange outflows include foreign exchange expenditures such as purchasing foreign equipment, materials and patent rights, as well as paying foreigners' wages, repaying foreign loan principal and interest, share capital and dividends. The performance of net foreign exchange effect is:
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Among them: P(FE) is the net foreign exchange effect, that is, the present value of the net foreign exchange flow during the life of the project; FIt is the foreign exchange inflow of the project in year T, t = 0, 1, 2, 3, …, n, FOt is the foreign exchange outflow of the project in year T, t = 0, 1, 2, 3, …, n, at is the discount factor corresponding to the social discount rate in year T.
(b) Resource efficiency indicators
Under certain demand conditions, the technical and economic evaluation of mineral resources is to evaluate the degree of meeting the demand from the perspective of supply. Generally, two indicators can be used to reflect the resource benefit: the degree of guarantee of mineral resources and the degree of utilization of mineral resources.
1. degree of mineral resources security
The guarantee degree of mineral resources is usually expressed by the number of years of guarantee demand, so as to analyze the degree to which the mineral meets the national or local demand from the aspects of time connection, spatial distribution and resource matching. , and calculated according to the long-term demand of national economy, existing mining level, mine design capacity and actual mining level. The guarantee index of mineral resources quantitatively reflects the scarcity of minerals and provides a basis for economic evaluation to choose a reasonable evaluation price.
2. Utilization degree of mineral resources
The utilization degree of mineral resources is an important benefit index to measure the principle of "meeting the demand to the maximum", which is often weighed with profitability index to comprehensively reflect the utilization range of mineral resources and the effectiveness of extraction purity.
In the practical application of the above two resource efficiency evaluation indicators, we should not only consider improving the degree of protection and utilization of mineral resources to social needs, but also strive to realize the full utilization of mine interests and resources, unified and reasonable protection and choose in the best balance.
(3) social benefit indicators
The macroeconomic evaluation of mineral deposits must follow the principle of combining economic benefits with social benefits, and comprehensively evaluate the influence of social factors such as ecology, environment, employment and distribution.
1. Employment effect
Employment opportunities refer to the number of jobs created by the evaluation object, including direct employment opportunities and indirect employment opportunities.
2. Distribution effect
Distribution effect refers to the proportion of income obtained by the state, enterprises and employees in the net value-added of national income, expressed as a percentage. It mainly includes the following parts:
Employee income distribution effect = [(salary income+welfare)/annual net value-added of project national income] × 100%.
Distribution effect of enterprises: it is the proportion of income obtained by enterprises in the net value-added of national income. Its calculation formula is:
Income distribution effect of enterprises (or departments) = (retained profits of enterprises/net appreciation of national income of projects) × 100%.
National (including regional) income distribution effect: refers to the proportion of national and local fiscal revenue in the net value-added of national income. Its calculation formula is:
National income distribution effect = [national (including regional) income/net value-added of project national income] × 100%.
Does not participate in the distribution of value-added, its calculation formula is:
Value-added not participating in distribution = [(development fund+equipment fund+social welfare fund)/annual net value-added of national income of the project] × 100%.
The sum of the above four distribution effects should be equal to 1. The evaluation of distribution effect is to calculate different distribution ratios to see whether they conform to national regulations and are beneficial to social development.