Institute for Economics and the Environment

I.E.E. text graphic

The Institute for Economics and the Environment (IEE) at Portland State University serves as a locus for investigation, discussion and training where the economy and the environment meet.

We offer seminars and community outreach events that address some of the key environmental issues facing our city, the region and the world. Connect with us to learn more about our executive courses, research projects and events!

For more information about past events including PowerPoint presentations and videos, please see our Public Events webpage.

Sahan Dissanayake photoIntroducing Dr. Sahan Dissanayake

Sahan T.M. Dissanayake is an Environmental Economist in the Economics Department and his research centers on ecosystem services, land conservation, renewable energy and climate change and uses survey methods and mathematical programming models. Sahan regularly works with practitioners and policy makers and is interested in contributing to solving practically relevant environmental issues using cutting edge methods.

Environment, Economics and You Speaker Series events will return in Winter 2019!

To view past Environment, Economics and You Speaker series presentations, please see our Public Events webpage.

Carbon Pricing

Pricing carbon is a critical step

to reduce greenhouse gas emissions

and climate change. The Oregon Economists’ Letter in Support of a Carbon Tax in Oregon, which has been signed by thirty-six professional economists, argues for implementing a largely revenue neutral carbon pricing system in Oregon. Watch the video from an expert panel held in April 2014, which examined carbon taxes in Oregon.

Read The Portland Business Journal's article The Cost of Carbon: Economists urge Salem to make polluters pay.




Learn about research projects undertaken by IEE faculty

members and students that focus on economics and the environment. IEE projects include research by Portland State University students on ecosystem services from Portland’s Forest Park conducted in collaboration with the Forest Park Conservancy, deforestation in Nepal   and evaluating improved cook stoves in Ethiopia.  

Read policy briefs on carbon sequestration, biogas use and community forestry in Nepal!

The Forest Park Conservancy project reports are available to view on our Forest Park and the City project page, including focus group results.

 Public Events

See all the pastpresent and future events hosted by IEE.

All events are free and open to everyone





















IEE to continue partnership with World Bank on improved cookstoves in Ethiopia. The new project focuses on the importance of household air pollution from burning fuelwood inside the home. Such pollution affects 3 billion people per year and is estimated to kill over 4 million people per year, making it one of the most important causes of premature death in the developing world.  IEE will test whether the Mirt stove reduces indoor air pollution and improves lung function of women and children.


IEE in partnership with the Forest Park Conservancy continues joint work on the value of Forest Park ecosystem services, with a series of focus groups across Portland summarized in a report released in September 2016 and a stakeholder workshop conducted in October 2016.

 For more information, visit our news feed.