Physical Input-Output Tables
Definition
Physical Input-Output Tables denotes the compilation of economic input output tables that trace the flow of physical quantities (as opposed to monetary representations of the same)[1]
Structure
The PIOT structure is derived from Economic Input–Output (EIO) models, but intersectoral flows are captured in physical units rather than monetary units. PIOTs were conceived of as a way of integrating the strengths of Input-Output Model modeling with Material Flow Analysis (MFA)
Usage
Physical input–output tables (PIOTs) were first conceptualized in the 1990s but have not been widely adopted. With the increased emphasis on building a circular economy and understanding the resource nexus, PIOTs become critical for optimizing resource flows and restructuring economies to close material loops.
Issues and Challenges
The slow adoption of PIOTs is attributed to high compilation costs, lack of physical data at the appropriate aggregation levels, lack of reproducibility and continuity in available datasets along with limited applications demonstrating the use of PIOT
References
- ↑ A modular bottom‐up approach for constructing physical input–output tables (PIOTs) based on process engineering models. Liz Wachs and Shweta Singh, 2018
