Advanced LCA – 12-716

Lecture 4

Admin Issues• Group Projects or Take-Home Final?

Your choice (individual choice)• EIO-LCA MATLAB version - some slight

improvements coming.• Collaboration on EIO-LCA matlab - if

you make new MATLAB matrices from HW 1, let me know and we will include them

Purchaser - Producer Prices

Take 2

First - diagonal in matlab.• Show trick with all 500 at once using

Chris’ method• Show each row is expected iterative

result• Then show doing it for purchaser then

producer effects.

Sectoral Mapping• Last time: talked about data sources for

concordances (e.g., BEA website)• How to actually do it?• MS ACCESS queries• Excel columns• Matrix bridges

– See Chris Weber’s China IO to OECD– Data entries equivalent as shown in Excel (BEA)

Allocation - back to ISO• What does framework tell us to do, and

how?• Rules?• Limitations?• In general, two options:

– Divide and conquer– Expand system boundaries

Case Study: Agriculture• Probably biggest area of need for work

in issues of LCI and allocation• Has most natural co-products, etc.• Good example that needs little

explanation

Corn Ethanol• Source: Kim and Dale, IJLCA, 2002.• Motivated by co-product issues, but point is a

general one• A little explanation - where’s Mike?• Some caveats: assumes corn for ethanol.

Will let Mike vent about that later (time permitting).

• So this is not an ideal system for ethanol LCI - it’s a system showing corn for ethanol.

Results

Pauli / Allocation of CO2