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The purpose of this paper is to analyze price transmission in the Chinese pork market between 1994 and 2016 and examine any incidence and causes of asymmetric price transmission.

The approach uses threshold autoregressive models, asymmetric error correction models and autoregressive moving average models to examine the price transmission using monthly pig and pork prices from 1994 to 2016.

While a symmetric price transmission between pork and pig prices was identified for the period between June 1994 and June 2007, an asymmetric price transmission response between pork and pig prices was found for the period July 2007 to June 2016. Key factors behind the asymmetric price transmission include the chicken price and China’s provisional purchasing and stockpiling policy which is having a counter-productive impact on prices.

The paper contributes to the literature by examining price transmission in two different periods: 1994 to 2007 where prices are lower and more stable; and 2007 to 2016 where prices are higher and volatile. The paper examines the impact of production and market policies on price transmission in the Chinese pork and pig market, with several policy implications.

The use of social media and information exchange increased during Covid-19 pandemic because people are isolated and working from home. The use of social media enhances information exchange in a global society, therefore customers are uncertain and not in a better position to take decisions before the situation goes worst everywhere in the world. The current study helps to understand how social media facilitate social and global engagement and information exchange which ultimately leads to the development of the customer psychology of stockpiling. This study aims to develop a research framework which helps to understand the customer psychology of stockpiling during a global pandemic.

This study opted for a social constructionist approach because it can help to understand both individual and social subjective realities with respect to stockpiling behaviour due to the fear and risk of Covid-19 pandemic. For this purpose, the researcher collected data from 40 customers of UK retail stores who actively use social media. The data were collected during telephonic interviews and thematic analysis was used for data analysis.

Results highlighted that institutional communication and social public interpretation of uncertainties and risk enhanced misinformation and sensationalism through social media platforms; therefore, stockpiling behaviour increased during Covid-19 pandemic. The fear of items being out of stock, illness, misinformation, family fear and going out were some of the possible causes that led to the development of panic stockpiling behaviour. The global uncertainty proof, as well as a public social consensus for staying at home and protecting the future also increased customers’ intention to buy in bulk for their future. Although social media played an important role in transferring relevant and timely information, it also increased uncertainty and social proof which may have led to stockpiling of retail products.

The results of this study are beneficial for understanding how Covid-19 creates and enhances uncertainties and risks at both global and national level which developed into customer panic stockpiling behaviour, even when there is no promotional scheme or decrease in prices. This study helps marketers understand the psychology of customer stockpiling during a global pandemic. This study also helps to understand the role of social media, which promotes social interpretations of uncertainties and risk which ultimately enhance panic stockpiling among customers.

Limited research is available which provides an understanding of how social media can play a role in socially generated uncertainties and risks, which enhance misinformation and sensationalism, as well as the development of stockpiling behaviour. This study provided a stockpiling behaviour model based on the theory of uncertainty and social proof. The results of this study are unique as there is limited literature available which connects social media, uncertainties and risk, Covid-19 pandemic and stockpiling behaviour among educated people.

The purpose of this paper is to examine whether Chinese pork reserve regulation policy fulfills its function in stabilizing market prices and simultaneously to theoretically and empirically analyze the causes leading to the failure of Chinese Government’s intervention in the market, especially in the context of asymmetric pork and hog price information transmission.

A modified Reserve-Cobweb model based on the competitive storage model developed by Muth in 1961 is employed to examine the transmission effect of hog and pork prices under the setting of Chinese Government’s pork reserve regulation policy, using the data on Chinese hog and pork prices from June 2009 to June 2015.

While the Reserve-Cobweb model provides theoretical insights, suggesting that the implementation of the government’s reserve policy tool to control price volatility actually leads to increased price volatility, the empirical results indicate that the policy induces hypercorrection and impels greater price volatility, especially in the context of existence of asymmetric price information transmission.

The Chinese Government should reduce excessive pork price intervention and instead allow the market to play its role in the hog and pork markets.

This paper develops a modified Reserve-Cobweb model based on the price transmission effect on different links within the agricultural products supply chain, which is used to empirically validate the existence of asymmetric price information transmission between pork and hog price in China.

Significant changes in British recreational drug use were seen throughout 2009, with the emergence and rapid growth in the availability and use of substituted cathinones or ‘M‐Cats’ (most notably mephedrone and methylone), a group of psychoactive drugs not currently controlled under the Misuse of Drugs Act 1971 (HM Government, 1971), with similar effects to ecstasy, cocaine and amphetamines. The reasons for the appearance and appeal of this group of so‐called ‘legal highs’ are explored here in relation to availability, purity, legality and convenience. The authors argue that a reduction in the availability (and thus purity) of illegal drugs such as ecstasy and cocaine and resultant disillusionment among users was a key motivation for displacement to substituted cathinones, conveniently and legally purchased online. Finally, we explore policy considerations around the likely criminalisation of substituted cathinones and the challenge of providing rapid yet considered harm reduction responses to emergent drug trends in the face of a minimal scientific evidence base and eager press demonisation.

Information sharing is one of essential collaboration methods for building effective system-level disruption responses and communication for supply chain resilience. However, supply chain members are often reluctant to share the members' business information for fear of losing competitiveness. To facilitate the cooperation among these members, the supply chain members' should be made aware of the value of information. As a result, the purpose of this paper is to quantify the benefit of information sharing and evaluate its magnitude under various factors.

In this paper, information sharing is measured in a two-stage supply chain containing a manufacturer and a retailer. A demand function is constructed as a linear combination of a first-order autoregressive [AR(1)] process, the retail and reference prices. The values of information sharing are quantified for four scenarios: (1) no information sharing, (2) full information sharing, (3) limited information sharing and (4) partial information sharing. Based on the four scenarios, the conditions for valuable information sharing are determined. In addition, the impact of several demand parameters on the usefulness of information sharing is analyzed.

When the demand function is a pure AR(1) process (i.e. there is no impact from the retail and reference prices), information sharing is always valuable regardless of the autoregressive coefficient. Under the influence of the retail price and consumer behavior via the reference price, information sharing is not always beneficial. The boundaries for useful information sharing are analytically constructed. In addition to full information sharing, this study also quantifies the value of information under a partial sharing scheme. The results indicate that the information is more valuable as long as the information is inducible.

This study highlights several specific conditions for a beneficial information sharing agreement in consideration of consumer behaviors. These conditions enable supply chain members to design a sustainable partnership.

This research is to examine the impact of online channels on food stockpile behavior.

In this study, we use bivariate probit models to empirically investigate the impact of online purchasing channels on Chinese urban consumer food hoarding behaviors with random survey samples.

Results show that fresh food e-commerce channels are more likely to be associated with panic stockpile behaviors due to higher likelihood of supply shortages than offline channels with government assistance in logistic management. In contrast, community group buy, another format of e-commerce, appears superior in satisfying the consumer needs and easing the panic buying perception.

It suggests that online channels may have diverse impacts on consumers' panic stockpiling behaviors during the extreme situations. Online channels need to develop efficient supply chains to be more resilient to extreme situations and the government shall recognize the increasing share of the online channels together with traditional offline channels when implementing supporting policies.

With ever increasing share of online channels, it is imperative in terms of policy implications to understand how would online channels affect hoarding behavior.

We are the first study in online shopping's impact on food stockpile during pandemics using a random sample. Although food stockpile behavior at times of emergency have been investigated in many literature, there are no empirical studies on the impact of online channels on stockpile behaviors under extreme situations. Unlike disasters that immediately impact every entity in supply chains covering producers, vendors, distribution centers and retailers, pandemics did not render supply chains affected immediately, but rather increase consumers' willingness to shop online to avoid virus. Thus, Covid-19 provides a natural experiment to investigate the online channels' impact on stockpile behavior.

This study aims to estimate the pass-through rate of the increases in the excise tax and TCF tax on tobacco in Vietnam. This study seeks to shed light on how the tax burden is split between consumers and producers and inform policy discussions in the country. Using panel micro-level data collected from three waves of a nationwide retailer's survey, this study provides an evidence-based pass-through estimation for tobacco tax in Vietnam and contributes to the understanding of tax policy on smoking and smoking-related issues.

Following increases in the excise tax and TCF tax on tobacco in 2019, the differential effect of the tax hike on the “treatment group” (domestic cigarettes) versus the “control group” (illicit cigarettes) using a difference-in-difference (DID) analysis has been studied. The study utilized unique longitudinal retailers’ data on cigarettes prices in Vietnam from 2018 to 2019 to estimate the tax pass-through rate for some of the most popular factory-made cigarette brands.

This study found evidence of an over-shifting of cigarette taxes on smokers. Specifically, it discovered that the tax increase is absorbed more by low-priced brand smokers compared to premium brand users due to (1) the limited increase in prices under a pure ad valorem system and (2) the way the Vietnamese currency is denominated. Additionally, there is evidence of cushioning to mitigate price shock on consumers as the real prices increase gradually over the period of one year after the tax change.

To the best of the authors’ knowledge, this study is the first to collect and analyze a unique panel micro-level data from three waves of a nationwide retailers’ survey, which captures the changes in marketing and pricing strategies of the tobacco industry in Vietnam before and after an increase in excise tax in 2019. The results of this study could be used as a reference for future policymakers in considering increasing taxes on tobacco.

This paper aims to apply the doctrine of siyasah shariyyah to a policy proposal in the area of monetary economics, namely, the Grondona system of conditional currency convertibility, which has been proposed as a practical means of resisting the economic instability caused by the present-day fiat money system.

The paper uses library research to review the literature relevant to the Grondona system, and examines the extent to which its operations conform to the principle of siyasah shariyyah, thereby encouraging Maslahah, i.e. the public interest.

It has been found that the Grondona system conforms to the philosophy of siyasah shariyyah because it promotes public welfare in a number of ways. First, it is based on the fundamental principle of Prophet Yusuf’s/Joseph (peace be upon him) economic planning, which is accumulating reserves of primary commodities during times of plenty and releasing those reserves of commodities during periods of scarcity. Second, it provides the necessary linkage between the monetary world and the real economy. Third, it could be implemented in parallel with the existing monetary system by using the national currency. Fourth, it would help the least developed countries of the world, which mainly depend on exports of primary commodities (mostly agricultural).

Because of the chosen research approach, this research study is theoretical in nature. Therefore, researchers are encouraged to evaluate the system from economic perspective based on simulation for the purpose of possible implementation.

The paper includes important implications for the policymakers in the Organization of Islamic Cooperation countries for the possible implementation of Grondona system.

This paper fulfils an identified need to apply the philosophy of siyasah shariyyah to the area of monetary economics.

This paper aims to propose models that capture the own effect of price promotions of virtue and vice products on sales and cross effects within the subcategory, between subcategories and between periods. The hypotheses assume that, due to reverse consumption self-control, the demand for vice products is more price-sensitive than demand for virtue products, but the demand for vice products is less price-sensitive between periods than demand for virtue products; furthermore, due to the degree of impulse-buying and to licensing, the demand sensitivity of the products of a subcategory and of those of other subcategories varies according to the type of promoted product (vice or virtue).

The methodology is based on different econometrical models that estimate the total net effect of price promotions of virtue and vice products on sales.

The results show a greater own effect for price promotions of vice products than for virtue products. However, the complementary sales effect between subcategories for virtue products facilitates greater expansion of the subcategory in virtue products than in vice products.

Although price promotions of virtue products (light) and vice products (regular) have proliferated in recent years, researchers have only estimated their own sales effect. Alternatively, the paper contributes by considering own and cross effects.

This article draws upon our perspective as academic-practitioners working in the fields of food insecurity, food systems, and inequality to comment, in the early stages of the pandemic and associated lockdown, on the empirical and ethical implications of COVID-19 for socio-economic inequalities in access to food in the UK. The COVID-19 pandemic has sharpened the profound insecurity of large segments of the UK population, an insecurity itself the product of a decade of “austerity” policies. Increased unemployment, reduced hours, and enforced self-isolation for multiple vulnerable groups is likely to lead to an increase in UK food insecurity, exacerbating diet-related health inequalities. The social and economic crisis associated with the pandemic has exposed the fragility of the system of food charity which, at present, is a key response to growing poverty. A vulnerable food system, with just-in-time supply chains, has been challenged by stockpiling. Resultant food supply issues at food banks, alongside rapidly increasing demand and reduced volunteer numbers, has undermined many food charities, especially independent food banks. In the light of this analysis, we make a series of recommendations. We call for an immediate end to the five week wait for Universal Credit and cash grants for low income households. We ask central and local government to recognise that many food aid providers are already at capacity and unable to adopt additional responsibilities. The government's – significant – response to the economic crisis associated with COVID-19 has underscored a key principle: it is the government's responsibility to protect population health, to guarantee household incomes, and to safeguard the economy. Millions of households were in poverty before the pandemic, and millions more will be so unless the government continues to protect household incomes through policy change.