Our Purpose

Our purpose is to improve the value of data and digital communications as tools for promoting international development and green growth.  

Dual Citizen was founded in 2010 amidst a global economy in turmoil. Besides the financial crisis, digital technologies continued to disrupt information flows while data were proliferating more rapidly than ever. Governments were allocating money and attention to new models of “green growth” that aimed to decouple economic growth from increases in carbon emissions. People, knowledge and data were moving faster than ever in real-time, across borders and more independently from the usual intermediaries of government or the mainstream media.

These developments presented tremendous opportunities for our clients but no clear roadmap for taking advantage of them. Our vision for the Dual Citizen practice is as a trusted link between our clients and these new opportunities: To empower our clients to leverage data and communications to advance their missions; to guide them on navigating new digital landscapes in a brand-appropriate language; and to advise them on identifying analytic tools and technological innovations to realize their strategic objectives.

We designed this website to present more detail on how we deliver this purpose in practice. Explore how we bring unique people and perspectives to our work through our founder and strategic advisor network; how we work with clients and partners on consulting engagements; why we publish the Global Green Economy Index™ (GGEI) and the distinctive value it brings to the topic; how we approach understanding linkages between carbon emission reductions and the broader economy; and speaking engagements around the world sharing this knowledge with our partners.

We hope you enjoy it and look forward to your feedback.


The Dual Citizen practice revolves around data analytics and promoting sustainable development for a diverse range of stakeholders and geographic contexts. Through consulting assignments, proprietary research and global engagement, we partner with clients to apply expertise in these areas to reorient and accelerate their companies, organizations and institutions on greener growth pathways. The practice can be understood as revolving around four main pillars:

1. Global Green Economy Index™ (GGEI)

Our flagship knowledge product, the GGEI provides a baseline for understanding national performance in the green economy, how it is judged by global practitioners, and how data and communications can help leaders improve on these results. But in many cases, the GGEI is also an entry point to more tailored consulting engagements, designed to look deeper at issues touched upon in the GGEI, but requiring further geographic localization, market sensitivity, or sectoral specificity. Some examples of customized consulting offerings that can complement a Subscription to the GGEI:

Bespoke Sustainability Measurement Frameworks

In the age of “big data,” we have ample information at our fingertips. But, often we lack the analytical expertise to synthesize them into a framework that is useful. Given our experience creating the GGEI and advising other organizations on index development, we help clients create bespoke sustainability measurement frameworks. These engagements help clients to define the key topics driving their sustainability strategy, locate the right data sets to measure them, and integrate them into an appropriate measurement framework for the desired target audience. In addition to supporting clients on the structure and methodology, we can also advise on data selection and strategies for addressing the ever-present challenge of missing data or lack of availability.

Customizations by Country, Region or City

Being a global index, the GGEI is built to look at the 130 countries it covers through one established framework with indicators, datasets and an underlying Methodology to support it. However, the pathways to green economic growth differ greatly between countries, and GGEI customizations allow for changing weights and other factors to better represent the local context, while still keeping the standard GGEI framework for country comparison. This customization also allows for the exclusion of sectors that are not of relevance to the national economy in question. Further, these customized versions of the GGEI can use national data (rather than the primarily international sources defining the main GGEI) and incorporate planned interventions derived from national development plans. These customizations can also be implemented for regions and cities.

Green Economy Progress Report

Sustainability performance is increasingly important when evaluating new investment. Green economy progress reports allow clients to see the progress (or lack of it) of different countries or regions covered on the GGEI. These reports can be fully customized to a client’s needs by using only GGEI data sets or suplementing this information with other data to gain a more complete picture of the economy in question. These reports can also consider past, present or planned policy interventions and how they might alter a given country’s green growth trajectory. 

Localized Perception Surveys

The perception survey for the GGEI is global, and polls practitioners on their perceptions of green economic performance. But while global perceptions are critical, local ones sometimes matter most for the immediate decisions faced by governments and private actors. Localized perception surveys draw upon our expertise conducting the global GGEI perception survey, but tailor this knowledge to more localized contexts.  Click here to access results from a recent localized perception survey assessing how we can reach a green breakthrough in the 2020s.

2. Climate Modeling and Systems Dynamics

In partnership with our strategic advisor Dr. Andrea Bassi, we developed a model tracking national efforts to reach emission reduction targets set at the 2015 Paris Climate Conference. The model tracks what countries are capable of achieving with smart, targeted policy interventions, what they are actually achieving, and how these efforts impact national energy markets, investment flows and employment. The first comprehensive study linked to this model was released during the Paris Climate Conference in December 2015 and can be accessed here. In 2020, we released an update incorporating new data and insight from the years following this release.

3. Artificial Intelligence & the Green Economy

Over the past year, we have analyzed new approaches to data collection and measurement for the Global Green Economy Index (GGEI) based in AI, machine learning and automated data processing. Can AI reveal new, sharper insights from unstructured GGEI datasets related to the commitment of actors and institutions to green growth? Can it accelerate data collection and localization from structured GGEI datasets related to renewable energy, air quality or forests? In partnership with our strategic advisor Karuna Ramakrishnan, we will be sharing soon the results from the inquiry. Be sure to sign up for our newsletter here to receive new content and webinar invitations related to this work.

4. Public Speaking, Live Workshops and Online Webinars

Dual Citizen founder Jeremy Tamanini is a frequent speaker at conferences, participant in private workshops and leader of online and live meetings through the practice. To connect with Jeremy or to discuss these consulting offerings further, please contact him here.