fix minor formatting error

drbenvincent · drbenvincent · commit df5ae6227ede · 2023-09-11T20:58:47.000+01:00
diff --git a/docs/source/examples.rst b/docs/source/examples.rst
@@ -54,7 +54,7 @@ Regression Discontinuity
 
 
 Instrumental Variables Regression
-========================
+=================================
 
 .. toctree::
    :titlesonly:
diff --git a/docs/source/index.rst b/docs/source/index.rst
@@ -110,7 +110,7 @@ Interrupted time series analysis is appropriate when you have a time series of o
 .. image:: _static/interrupted_time_series_pymc.svg
 
 Instrumental Variable Regression
-"""""""""""""""""""""""
+""""""""""""""""""""""""""""""""
 Instrumental Variable regression is an appropriate technique when you wish to estimate the treatment effect of some variable on another, but are concerned that the treatment variable is endogenous in the system of interest i.e. correlated with the errors. In this case an "instrument" variable can be used in a regression context to disentangle treatment effect due to the threat of confounding due to endogeneity.
 
 .. image:: _static/iv_reg2.png
