Examining the success of the tilapia industry in Huila, an emerging aquaculture hub in the Colombian Southwest

Submitted by Petra Hansson on

Questions:

1. Is tilapia production in Huila a sustainable endeavor from the Triple Bottom Line (Economic, Social, Environmental) perspective? 

2. Are there any significant differences in sustainability performance between the export- and domestically-oriented sectors?

Key Messages 

Fisheries

Disentangling the chicken or egg problem of household waste sorting and segregated waste collection

Submitted by Petra Hansson on

Merely providing a collection service that ensures waste segregated at source is not mixed during transportation is not enough to induce households to segregate. Information campaigns are a must. 

This research brief is based on the EfD Discussion Paper titled Disentangling the chicken or egg problem of household waste sorting and segregated waste collection: A randomized control trial in India by authors Shivani Wadehra, Zihan Nie, and Francisco Alpizar 

About the study 

Experiments, Policy Design, Urban, Waste

Land use and land cover change detection and prediction based on CA-Markov chain in the savannah ecological zone of Ghana

Submitted by Vicentia Quartey on
EfD Authors:

Environmental problems have accompanied the accelerated land use and land cover change (LULCC), yet few local level studies make an attempt to assess the dynamics of LULCC. This work employed GIS and remote sensing to quantify the past and predict future dynamics of LULCC based on the synergy Cellular Automata (CA) - Markov Chain Model (MCM).

Agriculture

Sustaining Protected Forests and Forest Resources in Ghana: An Empirical Evidence

Submitted by Vicentia Quartey on
EfD Authors:

The increasing concern for sustainable forest and protected forest resources motivates this study. In the wake of rising protected forest depletion, climate change and public health problems, this study through a bidding game format develops a sustainability index to show households’ sustainability behavior toward the protected forests in the Greater Accra Region of Ghana. Relying on a cross-section of household survey data and regression analysis, this study finds that overall, approximately 79% of respondents exhibited sustainable behavior toward protected forests in GAR.

Biodiversity, Conservation, Forestry

What drives stocking density decisions in the Chilean salmon industry? A retrospective analysis of stocking regulations

Submitted by Belén Pulgar on
EfD Authors:

According to Chilean legislation, a salmonid concession holder must choose between two mutually exclusive stocking density systems: Stocking Reduction Percentage (SRP) or Stocking by Density. This study identifies the main determinants in the choice of stocking system and estimates their marginal effects. The results suggest that if the previously stocked species is Atlantic salmon (Salmo salar), the probability of stocking by SRP increases by 36.6%.

Fisheries, Policy Design

The ties that bind us: Social networks and productivity in the factory

Submitted by Ishita Datta on
EfD Authors:

This study analyzes high frequency productivity data from Indian garment manufacturing, exploring how caste-based social networks affect individual and group productivity. With nearly 35,000 worker-days, a 1 percentage point increase in the same-caste workers boosts daily individual productivity by at least 0.09 points. Notably, the least efficient worker's productivity rises by almost 0.17 points with a 1 point increase in caste homogeneity. These findings, robust to unobservable factors, suggest production externalities driven by within-network peer effects as potential explanations.

Experiments

Beef supply chain in the state of Campeche, Mexico

Submitted by Marianela Arguello on

The beef production chain in Campeche consists of five links: a) inputs, b) production, c) collection, d) transformation, and e) commercialization. On the other hand, this study reveals a series of bottlenecks and limitations within the sector, which, being a production chain, are more commonly found in the primary links, such as the lack of price regulation, investment, technology, and associativism, among others.

Agriculture, Land

Beef supply chain in the state of Jalisco, Mexico

Submitted by Marianela Arguello on

The main outcome of this study reveals that beef cattle activity exhibits the structure of a production chain due to the presence of independent actors, limited contractual relationships, and prioritization of volume - and price-based approaches. However, it does not consider aspects such as the production model or quality. Additionally, it was identified that there is a lack of access to information among the actors in the supply chain, among other factors. 

 

Agriculture, Land