# Economic Driver Fields

This article explains **Economic Driver fields** in Model Reef.

You will learn:

* What counts as an economic driver.
* Which fields are important for economic drivers.
* How to shape economic drivers across time.

Economic drivers are value or rate based inputs such as prices, inflation, FX rates, discount factors and index series.

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### Examples of economic drivers

Typical economic drivers include:

* Unit prices for products or services.
* Inflation series for wages or costs.
* FX rate time series for currency conversion.
* Commodity prices.
* Index based series such as CPI-like assumptions.

These drivers are usually multiplied with operational drivers or variables.
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### Key fields for economic drivers

When editing an economic driver you will see fields such as:

* **Name**\
  A clear label, for example `Price - Product A` or `FX - EUR to GBP`.
* **Type**\
  Set to Economic driver.
* **Units**\
  For example currency per unit, percent or index.
* **Time series grid**\
  Values per period, which you can edit manually or populate via imports or presets.
* **Notes and tags**\
  To document the source and intended use of the driver.

These fields live in the Driver Editor and, in some cases, the Data Library.
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### Shaping economic driver series

You can shape economic drivers by:

* Typing values directly into the time series grid.
* Applying growth or escalation assumptions.
* Importing historical data and extending it forward.
* Applying seasonal multipliers where relevant.

A common pattern is to set a base rate and then apply a growth or inflation curve over time.
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### Using economic drivers in formulas

Economic drivers are often used in formulas such as:

* `Revenue = Units driver × Price driver`
* `Cost = Base amount × Inflation driver`
* `FX adjusted amount = Local amount × FX rate driver`

They are read only in formulas and do not themselves create accounting entries until used by variables.
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### Scenario specific economic drivers

Because each scenario is its own model:

* Economic drivers can differ between scenarios.
* You can test different price, inflation or FX paths by editing drivers in each scenario model.

This is central for valuation and planning use cases.
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## Related articles

* [Modifier Driver Fields](/syntax/drivers-syntax/modifier-driver-fields.md)
* [Operational Driver Fields](/syntax/drivers-syntax/operational-driver-fields.md)
* [Driver Overview](/help/drivers-variables-and-timing/driver-overview.md)
* [Build a Relative Valuation Using Fundamentals](/how-tos/valuation/build-a-relative-valuation-using-fundamentals.md)


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