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4424 J. Med. Plants Res.<br />
Table 1. Definition of variables.<br />
Variable name Variable definition<br />
Consumers' individual<br />
characteristic<br />
Health functions of the<br />
products<br />
Consumers' behavior<br />
Marketing factors<br />
A1 Male = 0, Female = 1<br />
A2<br />
Less than 29 years old = 1, 30-39 years old = 2, 40-49 years old = 3, 50-59 years old = 4,<br />
Over 60 years old = 5<br />
A3 High school graduates and below = 1, University graduates = 2, Post graduates = 3<br />
A4<br />
Less than 4000 RMB = 1, 4001-7000 RMB = 2, 7001-10000 RMB = 3, 10001-13000 RMB<br />
= 4, More than 13001 RMB = 5<br />
A5 Unmarried = 0, Married = 1<br />
A6<br />
Civil servant and public institution personnel = 1, Enterprise employee = 2, Service<br />
industries personnel = 3, Self employed = 4, Freelance = 5, Student =6, Others = 7<br />
B1 Very unimportant = 1, Unimportant = 2, No opinion = 3, Important = 4, Very important = 5<br />
B2 Very unimportant = 1, Unimportant = 2, No opinion = 3, Important = 4, Very important = 5<br />
C1 Very unimportant = 1, Unimportant = 2, No opinion = 3, Important = 4, Very important = 5<br />
C2 Very unimportant = 1, Unimportant = 2, No opinion = 3, Important = 4, Very important = 5<br />
C3 Very unimportant = 1, Unimportant = 2, No opinion = 3, Important = 4, Very important = 5<br />
C4 Very unimportant = 1, Unimportant = 2, No opinion = 3, Important = 4, Very important = 5<br />
C5 Very unimportant = 1, Unimportant = 2, No opinion = 3, Important = 4, Very important = 5<br />
D1 Very unimportant = 1, Unimportant = 2, No opinion = 3, Important = 4, Very important = 5<br />
D2 Very unimportant = 1, Unimportant = 2, No opinion = 3, Important = 4, Very important = 5<br />
D3 Very unimportant = 1, Unimportant = 2, No opinion = 3, Important = 4, Very important = 5<br />
Variables of the model are evaluated as: A1 gender, A2 age, A3 education, A4 household monthly income, A5 marital status, A6 profession, B1<br />
consumer attitudes of health functions, B2 consumer attitudes of active ingredient content, C1 taste of the products, C2 brand image, C3 comparative<br />
purchasing behavior, C4 gifts, C5 package, D1 price, D2 place, D3 media advertisement.<br />
development of industry is to establish a technological<br />
alliance, and speed up the development of common<br />
techniques and application of integrated innovations, to<br />
strengthen self-discipline and monitoring of production,<br />
and to expand sales market. Chen et al. (2001)<br />
considered that the potential market demand for C.<br />
sativus is huge, but we should pay attention to breeding,<br />
tissue culture and cultivation, guiding the consumers<br />
properly, and implementing the C. sativus industrialization<br />
project. With the product demand for C. sativus<br />
increasing rapidly, it is important for enterprises to<br />
establish the development strategy and provide policy<br />
advices based on market demand.<br />
The objective of this study is twofold: first, to estimate<br />
willingness to pay for C. sativus, and secondly, to<br />
examine heterogeneity in consumer valuation of<br />
functionality in C. sativus and to determine the effect of<br />
individual characteristics on consumers' choice decisions.<br />
This study contributes to the improvement and<br />
broadening of current knowledge about C. sativus<br />
demand in several ways. For this purpose, we analysed<br />
the variables of the consumers' individual characteristic,<br />
health functions of the products, consumers' behaviour<br />
and marketing factors. In addition, the results will also be<br />
of interest to government agencies and manufacturers<br />
who could use the information derived from this study in<br />
determining marketing strategies and setting up new<br />
policy tools.<br />
METHODOLOGY<br />
The data used in this paper was obtained from a survey on<br />
consumers' willingness to pay for C. sativus in June and July 2011.<br />
The survey was conducted face-to-face and through the internet.<br />
Considering the differences in economic development level and<br />
density of population among different cities and different districts<br />
within the cities, we used stratified sampling and random sampling<br />
to draw our subjects. The specific sites for investigation were<br />
chosen based on the administrative function zoning in Beijing,<br />
Shanghai, Hangzhou, Ningbo, Wenzhou, Shenyang, Guangzhou,<br />
Xi'an, Wuhan and Nanjing.<br />
Logistic model is used for analysis of consumers' willingness to<br />
pay for C. sativus. Logistic model describes the behaviour of<br />
consumers with a common consumption objective when they are<br />
faced with a variety of goods. However, the goods and choices<br />
must be highly differentiated by their individual attributes. Assuming<br />
that consumers' willingness to pay for C. sativus is dependent<br />
variable y, we divided influencing factors into four dimensions<br />
(Table 1):