With the rapid rise of green consumerism, firms are making conscious efforts for implementing strategies aimed at minimizing the environmental impact associated with their service offerings [1] . It has also translated into benefits for companies in terms of cost savings, new market opportunities, enhanced brand image and customer loyalty [2] [3] . Although such studies have been abundant in developed economies they are still at infancy stage in developing markets which offer their own unique complexities with researchers calling for further studies [4] [5] . [6] has defined socially conscious consumer as “a consumer who takes into account the public consequences of his or her private consumption or who attempts to use his or her purchasing power to bring about social change” (p. 188).

Environmental problems and issues have been gaining prominence and debated extensively over the last few decades with majority of respondents from all over the world indicating that environmental issues are a cause of concern for them [7] [8] . They have realized the seriousness of issues such as environmental degradation, climate change etc. translating into ecologically conscious behavior fuelled by a desire to buy eco-friendly products and services, favoring businesses that prefer environmental practice [9] [10] [11] .

Evidence indicates that large numbers of consumers are now willing to pay for green products [12] [13] . In fact, a recent [14] report has pointed out that energy consumption and associated emissions can be reduced globally by modifying consumption patterns, using energy savings measures, and reducing food wastage. However, one area which has not received attention is the link between Perceived environmental knowledge (PEK) and Ecologically Conscious Consumer Behavior (ECCB) (Figure 1). Although companies are trying to bank upon this green products trend and coming up with products their success rate has been far from desirable [15] . So, although there are claims of people caring for environment why is it not translating into action? Some possible reasons could be their higher prices or the inability of people to understand its benefits [16] [17] . We believe that Price Fairness (PF) mediates this relationship and there is a moderation effect between Perceived Environmental Knowledge (PEK) and Price Fairness (PF) by Environmental Concern (EC). The article is organized as follows; we start with a brief literature review of all the relevant concepts and formulate our arguments for the hypothesis. This is followed by description of the research methodology which describes the data collection procedure, data analysis and results in detail, followed by discussion and limitation, future research scope .

Environmental concern is the fundamental pillar on which consumer environmental research is based [18] . A basic agreement regarding the meaning of the term is that it refers to how conscious are people regarding issue related to environment and how willing are they to address such issues reflecting their attitude towards environment protection [19] [20] . Evidence indicates that environmental concern significantly impacts consumers attitude towards green products

[21] thereby having an influence on their intention of purchasing such products [22] [23] . Individual’s level of environmental concern is reflected in his inclination to behave in Ecologically Conscious Consumer Behavior (ECCB) [10] [24] . In fact [25] , that recycling behavior among individuals was based on strength of the attitude thereby further strengthening our argument that environmental concern would result in ECCB. Hence such concerned consumers are more likely to were more likely to buy eco-friendly products to confirm their commitment towards environment [26] .

In case of individuals who are price and value conscious, if the reward/benefit sought after purchase is in future it has a negative influence on purchase intention [27] . Usually in the case of green products the benefits are realized at a point in time in future [28] . Price fairness has been identified as one psychological factor that exerts an important influence on consumers’ reactions to prices (e.g. [29] [30] [31] ). Fairness is a decision based on the significance of the value derived from a given product or service, whereas value is simply an assessment between the amount paid and some conception about quality which may be based upon either the buyer’s reference price or their willingness to pay [32] . For example a value based consumer would prefer normal vegetables/lentils instead of organic vegetable/lentils free from pesticides due to his value consciousness. Fairness has been conceptualized as “a judgment of whether an outcome and/or the process to reach an outcome are reasonable, acceptable, or just” [33] . Consumers usually form an acceptable price range in their minds on the basis of their previous transaction and consider any deviation from this range as unfair [34] [35] . Evidence from previous studies indicates that consumers attach importance to price fairness and don’t accept ranges considered unfavorable by them (e.g. [30] [31] [36] [37] ). In fact they look for causality and try to understand why this has happened [38] [39] . Since green products are priced higher in comparison to their non-green alternatives, consumers’ perceptions of the value they offer might be less in the short run [17] [28] . However, the total utility of green products may appeal to consumers with an enhanced sense of environmental and social consciousness.

Usually the purchase behavior of individuals is based upon an assessment of the benefits and costs which are of immediate significance solely to him, whereas in contrast, individuals exhibiting environmentally conscious behavior have a more future-oriented outcome (e.g. cleaner environment) which would benefit the society [19] [40] . According to [41] , “ecologically conscious consumers are defined as those who purchase products and services which they perceive to have a positive (or less negative) impact on the environment”. In fact they have further argues that both policymakers and marketers need to have a clear understanding of factors which might promote pro environmental behaviors.

Perceived environmental knowledge (PEK) has been conceptualized as one’s mental ability of understanding issues relate to environment or sustainability primarily related to pollution of air and water, using energy efficiently and conserving it and the impact of these on society and physical environment at par [22] [42] [43] [44] . Previous studies have found that attaining increased level of environmental knowledge leads to pro-environmental behavior which significantly affects consumers’ intention to buy green products [45] [46] . In the context of emerging economies, few studies have found that perceived environmental knowledge may have a direct relation with favorable attitude towards green products which further effects on purchase intention for such products [22] [42] [47] . [48] have found that knowledge about environmental issues among university students influences their pro-environmental intention and behavior.

Based upon the literature review above, we can postulate the following hypothesis:

Hypothesis 1: There exists a positive relationship between Perceived Environmental Knowledge and Ecologically Conscious Consumer Behavior.

Hypothesis 2: The relationship between Perceived Environmental Knowledge and Ecologically Conscious Consumer behavior is mediated by price fairness.

Hypothesis 3: The relationship between Perceived environmental knowledge and price fairness is moderated by Environmental Concern.

Hypothesis 4: Price fairness moderates the strength of the mediated relationship between Perceived Environmental Knowledge and Ecologically Conscious Consumer behavior via Environmental Concern.

The cross-sectional data were obtained through self-administered questionnaire from business school students in Hyderabad. The reason for selecting business school students is that today youth have become more concerned about the impact of their choices. We followed convenience sampling for collecting the data. Although there are concerns regarding the generalizability of results of convenience sampling researchers such as Cheah and [49] [50] have confirmed that students represent the ideal sample for such studies. The survey questionnaire includes study variables using established scales published in top journals and few demographics like age, gender and income. A total of 192 usable responses were obtained for an overall response rate of 76.8%. Of respondents, 36% female and 64% male, the average age is 22 and the average income is 12 lakhs.

This study used the measurement scales which have been previously validated in available literature. Perceived Environmental Knowledge (PEK) was measured by four-item instrument based on the research of [44] , Environmental Concern (EC) was measured by four items instrument based on the research of [51] . Environmental Conscious Consumer Behavior (ECCB) was measured by 12-item instrument based on the research of [41] original 30-item ECCB scale. Price Fairness (PF) was measured by three-item instrument based on the research of [52] . All items were measured by a seven-point Likert scale, where 1 denoted strongly disagree, and 7 denoted strongly agree. The study used gender, age, family income as control variables. PROCESS macro used to estimate the indirect effects using bootstrap samples (5000 resamples) using 95% confidence interval. The reliability and validity of the measurement scales are shown in Table 1.

In this study, the measurement and structural models were evaluated using the Partial Least Square Structural Equation Modeling (PLS-SEM) using SmartPLS 3.2.7 statistical software package [53] . The moderated mediation model is tested using Process macro 3.2 with 5000 Bootstrap Samples recommended by [54] . The rationale behind using PLS-SEM over covariance-based SEM is because of the following advantages [55] [56] [57] : 1) major focus on theory development 2) ability to handle smaller sample size (192 observations) and 3) capability of handling non-normal data. The effect of control variables (gender, age, family income) used in the study is not statistically significant. Hence, the results of control variables are not presented in the paper.

The measurement model was evaluated based on the factor loadings, Cronbach’s alpha, composite reliability, average variance extracted (AVE), discriminant validity using Fornell-Larcker Criterion [58] . The result of measurement model is presented in Table 2 and Figure 2 showed that all items in the study variables properly loaded and statistically significant with 5000 bootstrap samples [59] [60] . The Cronbach’s alpha and the composite reliability values are range from

Note: Diagonal values are square root of AVE and off the diagonal values correlations among latent constructs.

Note: CA = Cronbach’s Alpha, CR = Composite Reliability, AVE = Average Variance Extracted.

0.808 to 0.936 and The AVE values of latent constructs are greater than 0.5 which proved the reliability of the latent constructs [61] . Fornell-Larcker Criterion discriminant validity presented in Table 1 shows that all the diagonal values (square root of AVE) are greater than off the diagonal values (correlations), which establishes the discriminant validity among latent constructs [62] .

The structural model was evaluated using the path coefficient, coefficient of determination (R²) effect size (f²), predictive relevance (Q²). Table 3 shows the results of structural model evaluation, which implies that all the direct relationships are statistically significant except the relationship between Environmental Concern and Price fairness. Hence, the first hypothesis that there exists a positive relationship between Perceived environmental knowledge (β = 0.376 at P < 0.01 significance level) and Ecologically Conscious Consumer Behavior holds true. The coefficient of determination R² values for price fairness (R² = 0.078) and Ecologically Conscious Consumer Behavior (R² = 0.27) are reported. In addition, the Structural Model evaluation showed satisfactory predictive relevance Q² (Ecologically Conscious Consumer Behavior = 0.073 and Price Fairness = 0.043) and effect size f² (Environmental Concern = 0.025 and Perceived Environmental Knowledge = 0.040) [58] . Finally, the overall model fit is evaluated

Note: EC = Environmental Concern, PF=Price Fairness, ECCB = Ecologically Conscious Consumer Behavior, PEK = Perceived Environmental Knowledge, β = Standardized Beta Coefficient, se = Standard Error, t = t Statistics, P = Probability Value, LLCI = Lower Limit Confidence Interval, ULCI = Upper Limit Confidence Interval.

using standardized root mean square residual (SRMR) value [63] . SRMR value of closer to zero indicates a perfect model fit, SRMR value of the present study is 0.084 indicating a good fit [64] . This section examines the importance of brand image and satisfaction to build the long-term relationship with the travelers. Heterogeneity is the major concern for applying different techniques in service research. To address this issue, we used Classification and Regression Tree Approach (CART), to ensure the robustness of the research model. To ensure the robustness of the research model the Classification and Regression Tree Approach (CART) is used identify the unobserved heterogeneity in the homogeneous sample [65] . CART methodology identified key variables to predict the Ecologically Conscious Consumer Behavior is environmental concern which divide the sample into two groups (G1 = 102 and G2 = 90). The profiling of these groups can help us the get deeper understanding of data and the relationship between endogenous and exogenous variables.

The moderated mediation model was analyzed using the PROCESS macro in IBM SPSS [54] for estimating the direct and indirect effects of Perceived environmental knowledge on Ecologically Conscious Consumer Behavior mediated by price fairness and moderated by Environmental Concern [54] Model 7. To evaluate the statistical significance of mediation and moderation effect 95% bias-corrected 5000 bootstrap samples were used. The results of moderated mediation model with direct effect conditional indirect effect and index of moderation mediation is presented in Table 1 and Figure 3.

The simple mediation analysis depicted above proves that there is a mediating effect of price fairness (β = 0.416 at P < 0.01 significance level) between perceived environmental knowledge and Environmental Conscious Consumer Behavior leading to acceptance of hypothesis 2 which states that the relationship between Perceived Environmental Knowledge and Ecologically Conscious Consumer Behavior is mediated by price fairness. Similarly, the study showed the moderating effect of environmental concern (β = 0.416 at P < 0.05 significance level with 0.035 Change in R²) between perceived environmental knowledge and price fairness. Hence, hypothesis 3 which states that the relationship between Perceived environmental knowledge and price fairness is moderated by Environmental Concern is accepted. Finally, the study concluded that there is a partial moderated mediation effect (β = 0.057, LCL = 0.006, UCL = 0.135) between perceived environmental knowledge and environmental conscious consumer behavior which prove the hypothesis 4 Price fairness moderates the strength of the mediated relationship between Perceived Environmental Knowledge and Ecologically Conscious Consumer Behavior via Environmental Concern. The conditional indirect (Table 4) shows that the moderation effect is holding true at mean level and high level of environmental concern.

The present study examined the relationship between Perceived Environmental Knowledge and Ecologically Conscious Consumer Behavior mediated by price fairness. We also tested for the moderation effect of environmental concern between the Perceived Environmental Knowledge and price fairness.to the best of our knowledge no previous study has established these linkages. The study identified that consumer with high and average environmental concern has increased level of Ecologically Conscious Consumer Behavior compared to consumer with low level of environmental concern. Also, since our study has been done in Indian context hence it offers greater insights for companies regarding consumer behavior. The results of this study substantiate that all the proposed hypothesized relationships hold true.

Today youth constitute the majority of Indian population who are more conscious about the effect of their activities on environment and want value for their money. Hence, efforts to increase perceived environmental knowledge should be emphasized by both corporates and policymakers through all their communication efforts.

This study has few limitations which can be addressed by future research. First the study is limited to a particular geographical area of India i.e. Hyderabad thereby limiting its generalization in the overall Indian context. Also, in spite of our best effort to include the most important variables that could possibly influence the relationship between Perceived Environmental Knowledge and Ecologically Conscious Consumer Behavior, there might be other indirect or intervening variables like green trust, perceived risk, etc., which could shed light on Ecologically Conscious Consumer Behavior formation. The cross-sectional data maybe an issue in generalizing the research findings hence; further studies should adopt longitudinal approach for capturing change in behavioral pattern over a period of time.

The authors declare no conflicts of interest regarding the publication of this paper.

Das, M. and Ramalingam, M. (2019) Does Knowledge Translate into Action? Impact of Perceived Environmental Knowledge on Ecologically Conscious Consumer Behavior. Theoretical Economics Letters, 9, 1338-1352. https://doi.org/10.4236/tel.2019.95087