Evaluation methodology selection wizard
Methodology finder – Fiscal and tariffs – Passenger transport
Available policy / sector / method combinations described in specific evaluation guides
- Stock modelling [GUIDE 20]
Stock models for energy consumption represent a key tool to assist with the efficient and rational implementation of policy. Stock modelling concerns changes, due to energy policy, in the stock of energy using systems, such as dwellings, appliances or cars. Every year, part of the old systems is replaced by a more efficient new one and these saving actions lead to increasing overall savings over time. In most cases deemed savings are used to calculate the unitary savings (that is the savings due to one replacement), but for dwellings engineering estimates can be used as well.
Evaluation methodology comparison table
| Evaluation method | Pros & cons | Method characteristics | Required input data | |||||||
| Pro | Con | Savings output | Aggregation level | Application (ex-ante/ex-post) | Energy use before and after actions | Number of energy saving actions | Energy saved per action | Normalisation factors | Gross-to-net adjustments | |
| Stock modelling | Easy calculation | A lot of data needed | Number of actions | Bottom-up | Ex-ante and ex-post | No (see deemed savings as complementary method) | From method (stock/market data > replaced equipment) | Yes, from complementary method | See deemed savings as complementary method | E.g. free riders (in number of actions) |
| Econometric modelling Fallback methodology: all sectors / econometric modelling [GUIDE 21] |
Explanation of relations | Possibly missing factors | Total savings | Top-down | Ex-post only | For (sub)sector | Depends on case | Depends on case | For behaviour, temperature, activity level | No (if covered in method) |
| Econometric – Price elasticity Fallback methodology: all sectors / econometric price elasticity [GUIDE 22] |
Simple (only price) | Situation dependent | Total savings | Top-down | Ex-ante and ex-post | For (sub)sector | No (included in total savings) | No (included in total savings) | No (method on normalised case) | E.g. double counting |