3.1. Literature Review
The purpose of official development assistance (ODA) is not simply limited to economic growth and social welfare improvement in recipient nations, but it is also carried out with various backgrounds, including political and diplomatic goals, the economic motivations of donors, humanitarian aid, and increased interdependence among countries [
20,
21]. Notwithstanding, ODA is usually embarked on for the purpose of aid in funds, technical skills or technologies for economic development and social welfare growth of a developing country to its central and local governments, or international organizations, from public institutions of a donor country, such as the central or local governments and their executive organs, as put by the Organization for Economic Cooperation and Development’s Development Assistance Committee (OECD DAC). ODA is limited to aid that satisfies the following four criteria. It should be carried out (1) by public bodies such as central or local governments and their executive institutions of the donor country (2) for the purpose of economic development or welfare growth of a recipient country, and not for commercial and military purposes, (3) to developing countries or eligible international organizations that are included on the list of the OECD DAC, and (4) with at least a 25 percent grant component if it is given in a grant-in-aid or a loan. Hence, much literature—either with case studies or with quantitative research—has hitherto reported the benefits of ODA in developing countries in terms of economic effects [
22,
23] or the political effects on democracy [
24,
25], despite its problems and limitations investigated [
26,
27,
28].
In particular, a greater effect of assistance in agricultural development than in other industrial sectors for rural economic growth and poverty reduction has recently been researched in earnest. For instance, according to Mellor [
3], agricultural productivity growth is more likely to reduce rural poverty effectively, because it generates income for poor farmers. This reduces urban poverty as well, by slowing migration to urban areas and generating an increased demand for goods and services from rural areas. Moreover, increases in agricultural productivity also result in lower food prices that primarily benefit both the rural and urban poor. Dethier and Effenberger [
4] argue that food productivity is essential in developing countries for food security and poverty alleviation, and hold that viable solutions for better food productivity are required for a number of complex technical and institutional policy issues. The policy issues include land markets, research on seeds and inputs, agricultural extension, credit, rural infrastructure, storage, connection to markets, rural nonfarm employment, and food price stabilization. Similar results are also found in other studies [
6,
7,
8,
9,
29,
30].
Moreover, the importance of agricultural technology in economic growth has continued to be studied. Lipton [
10] shows that agricultural growth based on improved technology is effective in reducing poverty in developing countries. Kerr and Kolavalli [
11] highlight the role of improved agricultural technology, primarily by international agricultural research systems, in alleviating poverty, although technology’s role is indirect and partial because it is combined with other socioeconomic and institutional factors. Thirtle, Lin and Piesse [
2] hold that it is research-led technological change in agriculture that generates productivity growth, with high rates of return in Africa and Asia, and has a substantial impact on poverty alleviation, whereas productivity growth in industry and services has no impact. The authors estimate that productivity growth in agriculture by research-led technological change reduces the number of people around the world living on less than
$1 per day by 27 million per annum. In an empirical cross-country analysis of agricultural technology’s role in economic development, Self and Grabowski [
12] argue that improvements in agricultural technology have a significant impact on both measures of economic growth and human development. These results are also echoed in other studies [
13,
31,
32].
Given the literature discussed above, this study aims to find empirical evidence of the beneficial effects, in terms of production and value-added inducement, that agricultural development assistance by the Korean Programs on International Agriculture (KOPIA) bring about in recipients’ economies. Hence, production and value-added growth by KOPIA projects in recipients’ industries are deeply assessed with inter-industrial relation analysis, although the direct effects of advancements in agricultural technology through the projects are briefly sketched, with focal cases in the second section. This underlies an important role of agriculture and agricultural technology in the development process and the benefits of ODA in a recipient’s economy via inter-industrial relations. Thus, the key contribution of this study is to explore, for the first time, the economic effects of the KOPIA, as aid in the development of agricultural technology, with nine years of data for 23 countries.
3.2. Models and Data
The increase in agricultural productivity and rural economic growth by research-driven agricultural development assistance projects might lead to the growth of production demand in relevant industries, and this growth could again cause an increase in production in other industries. Therefore, the economic benefits of agricultural development assistance are supposed to spill over into entire industries through inter-industrial chains, and are not simply confined to the agricultural sector. Accordingly, the economic benefits of the KOPIA for the 23 recipient countries can be comprehensively assessed using the inter-industrial relation analysis method and a demand-driven model with an IO table for each recipient country.
IO analysis is a practical extension of the classical theory of general interdependence, which views the whole economy of a region, country and even the entire world as a single system, and sets out to describe and interpret its operation in terms of directly observable basic structural relations [
33]. In a national economy, each industry purchases goods and services for production activities and sells the products produced to other industries, thereby establishing direct or indirect relationships. The IO table is a statistical table that records these inter-industry transaction relationships in a matrix form based on certain principles for a certain period of time (usually one year), and the quantitative analysis of inter-industry correlations using IO tables is called inter-industry analysis or input-output analysis.
While the analysis of national income has the advantage of indicating the level of activity of the entire national economy, the analysis of IO tables has the advantage of grasping the correlation between industries in terms of industrial structure. In addition, the analysis of industry-related effects such as production, employment and income caused by final demand can be divided into industries and analyzed by various industries, so it is used in various fields such as economic policy establishment and policy effect measurement [
33].
Inter-industrial relation analysis starts with the calculation of an input coefficient representing the input composition ratio of raw materials in each industry sector. Production inducement coefficients are the direct and indirect production ripple effects of each sector due to final demand, which plays a central role in industry-related analysis [
33]. The structure of an IO table is expressed as in
Table 3. Both the production and value-added inducement effect can be estimated with an IO table and the amount of KOPIA’s annual budget for each country. The demand-driven model is widely used to calculate the amount of product needed to satisfy final demand in all industries [
33,
34,
35].
In an IO table, the structure of products in industry
can be expressed with Equation (1), where
,
,
and
represent the total amount of products, intermediate demand, final demand and total imports in industry
, respectively, and
indicates the ratio of the amount of input resource
used in sector
to the total amount of products in sector
. Equation (1) means that the total amount of products in a sector is equal to a value that from the sum of products in a sector input to products in all sectors, plus the amount of final demand, subtracts the amount of total imports in the sector. Equation (1) can be converted to a matrix equation as in Equation (2), and it can be again converted to Equation (4) via Equation (3) to get the solution for the variable
.
Here,
represents a vector of the total amount of products,
is a matrix of input coefficients,
is a vector of final demand, and
indicates a vector of the amount of imports.
In Equation (4), factor indicates the production inducement coefficient (PIC). If the value of the PIC is estimated, a change in the total amount of products (), which is induced directly or indirectly by an increase in the final demand () in all industries, can be readily calculated.
In addition, the converted factor indicates the value-added inducement coefficient (VIC), where υ indicates a vector of added value, and represents a diagonal matrix of value-added ratios. The VIC means an increase in the total amount of added value induced directly or indirectly in the whole national economy when the final demand for the domestic products of an industrial sector increases by a unit.
The data for the amount of each KOPIA center’s annual budget was obtained from the RDA’s annual report for the KOPIA (2009–2017, each year) [
18], and data of the IO tables for the inter-industry relation analysis was gathered from the Eora multi-region input-output (Eora MRIO) database [
36]. The Eora are an indigenous Australian people of New South Wales. The Eora project, carried out with the support of the Australian Research Council at Sydney University, provides MRIO tables for a total of 190 countries from 1970 through 2015. To estimate the coefficients for production and value-added inducement, the industry related to the KOPIA was matched with one of the industries classified in the Eora database. The Eora MRIO database [
36] classifies the total industries into 26 categories: “Agriculture,” “Fishing,” “Mining and Quarrying,” “Food and Beverages,” “Textiles and Wearing Apparel,” “Wood and Paper,” “Petroleum, Chemical and Non-Metallic Mineral Products,” “Metal Products,” “Electrical and Machinery,” “Transport Equipment,” “Other Manufacturing,” “Recycling,” “Electricity, Gas and Water,” “Construction,” “Maintenance and Repair,” “Wholesale Trade,” “Retail Trade,” “Hotels and Restaurants,” “Transport,” “Post and Telecommunications,” “Financial Intermediation and Business Activities,” “Public Administration,” “Education, Health and Other Services,” “Private Households,” “Others,” and “Re-export and Re-import.” In addition, as the database provides either an industry-symmetric or a commodity-symmetric IO table by country, all of the tables of the 23 countries were converted to industry-symmetric tables for coherent comparison. The annual budgets of the KOPIA centers may be regarded to be an increase in investment in or ultimate demand for agriculture in the IO table of a country. Using the data, the PICs are estimated for the 23 countries and the VICs only for 13 countries, which provide the information on imports needed to get the VICs by industry. Due to the absence of IO tables for 2016 and 2017, the coefficients for both years are substituted with the coefficients for the year 2015, as shown in
Table 4 and Table 6.