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Abstract The reservation of goods to be produced in the micro, small, and medium enterprises (MSME) sector, in the early years after India's independence, addressed the dual needs of development of the industrial sector and production of goods. However, these industrial policies created an incentive for firms to remain small so that they can continue to avail of the benefits provided by the Government. On the positive side, the MSMEs typically employ more labor intensive production processes and consequently contribute significantly to the provision of employment opportunities, generation of income, and poverty reduction. But, on the negative side, the policies have also partly facilitated the creation of a divide in terms of productivity between the MSMEs and large sized firms. In particular the policy raises important questions for a firm auctioning supply contracts among suppliers with a significant cost differential. In this paper we propose an idea to allocate supply contracts wherein a manufacturing firm partitions the stochastic demand into mutually exclusive portions and awards each portion to a different supplier. We characterize such an optimal procurement mechanism when there are two types of suppliers and an arbitrary number of demand portions. We show that the optimal procurement may require the manufacturer to intentionally withhold some demand portion, and this arises when one type of supplier is considerably inefficient in serving a demand portion. We extend our analysis to the cases with multiple types with two suppliers and two types with multiple suppliers. The optimal partition is composed of at most six contiguous demand portions, and it may include a detrimental demand portion that only generates a negative expected payoff to both supplier types. Our demand partitioning mechanism leads to a strictly higher manufacturer's expected payoff than the conventional winner-take-all case unless one supplier type completely dominates the other. We present numerical experiments that indicate when such a mechanism holds the greatest advantage for the buyer.

Improper domestic food handling in rural areas of China is an important public health issue leading to foodborne illness. However, the underlying factors responsible for poor domestic food hygiene practices have not been comprehensively studied. Here, a cross-sectional study was conducted in Anhui Province, China between 2015 - 2016, using a questionnaire to collect data from 819 respondents, selected using multistage cluster random sampling techniques. Multivariate logistic regression analysis was then used to assess the demographic factors associated with improper food handling. Results showed that 525 (64.1%) of respondents used improper food handling techniques. The factors associated with improper food handling included gender, age, education, income, and occupation. Males (vs. females), adults aged ≥ 50 years (vs. those aged 18 - 30 years), individuals with primary school education or lower (vs. individuals with a bachelor's degree or higher), individuals with annual incomes of < 4,387 USD (vs. income ≥ 13,161 USD), and workers (vs. other occupation groups) were more likely to report inappropriate food handling practices in rural areas. The results obtained from the present work may provide the basis for training in domestic food safety hygiene/handling practices in rural areas of China in order to reduce the incidence of foodborne illnesses.

This work was supported in part by the Asturias Regional Government under Research Grant Severo Ochoa PA-17-PF-BP16151, in part by the Solid-State Lighting Systems Dept. ITRI Hsinchu, Taiwan, R.O.C., and in part by the Brazilian Government through CAPES/PRINT No. 41/2017, 88887.364657/2019-00, INCT-GD, CAPES Project 23038.000776/2017-54, CNPq Project 465640/2014-1, and FAPERGS Project 17/2551-0000517-1.