[inflation_history] Price Level Histories Editorial Suggestions

Remaining items

• Potentially put the graphs from the book into the lecture.
• Add a discussion on money supply and price level.

--- Items that have been addressed

Code

• Check why the index starts from 1915 in df_fig5_bef1914.
• Set global dpi default.
• variable name m_seq.
• Remove dots and connect them.

Content

• "Often the price level ended near..." -> "Often the price levels ended near...".
• "vis a vis" -> "vis à vis".
• "exp p" -> "retail price level exp p".