The COVID-19 pandemic has hampered consumers' psychological well-being and devastated businesses, especially in the leisure travel industry. Research shows that nostalgia can counteract negative emotions (Tilburg and Igou, 2013; Zhou et al., 2008) and improve psychological well-being (e.g., Cheung et al., 2013; Routledge et al., 2011, 2012, 2013; Sedikides et al., 2016). Please design a marketing message that embeds the concept of nostalgia and another factor that can potentially moderate the effect of nostalgia to increase consumer desire for post-pandemic travel. Your idea should be ORIGINAL. Specifically, please address the following aspects: 

• What can be the second factor (moderator) that you think can moderate the effect of a nostalgic marketing message? Briefly justify why. 

• How to manipulate the two independent variables? 

• How to measure the dependent variable? 

• Briefly write the procedure of the study.