This section provides a number of ways of assessing whether
the outcomes you have analysed result from your activities.
These methods provide a way of estimating how much of the
outcome would have happened anyway and what proportion of
the outcome can be isolated as being added by your activities.
This is what we mean when we use the term impact.
Establishing impact is important as it reduces the risk of over-
claiming and means that your story will be more credible. It is
only by measuring and accounting for all of these factors that
a sense of the impact that the activity is having can be gained.
Otherwise there is the risk of investing in initiatives that don’t
work, or don’t work as well as intended. As you will see,
establishing impact may also help you identify any important
stakeholders that you have missed.
Stag Stag
There are four parts to this section:
e e
 
4.1 Deadweight and displacement
4.2 Attribution
4.3 Drop-off
4.4 Calculating your impact
A guide to Social Return on Investment 
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