Tom's June 6 mid afternoon tweaks and corrections

Author: thomassargent30

lectures/_static/quant-econ.bib

@@ -7,7 +7,7 @@ @incollection{sargent1982ends
   title={The ends of four big inflations},
   author={Sargent, Thomas J},
   booktitle={Inflation: Causes and effects},
-  editor = {Hall, Robert E}
+  editor = {Hall, Robert E},
   pages={41--98},
   year={1982},
   publisher={University of Chicago Press}

lectures/about.md

@@ -60,6 +60,7 @@ In particular, we sincerely thank and give credit to
 
 - [Aakash Gupta](https://github.com/AakashGfude)
 - [Shu Hu](https://github.com/shlff)
+- [Jiacheng Li](https://l10727@nyu.edu)
 - [Smit Lunagariya](https://github.com/Smit-create)
 - [Matthew McKay](https://github.com/mmcky)
 - [Maanasee Sharma](https://github.com/maanasee)

lectures/cons_smooth.md

@@ -79,7 +79,7 @@ W = \sum_{t=0}^T \beta^t (g_1 c_t - \frac{g_2}{2} c_t^2 )
 
 where $g_1 > 0, g_2 > 0$.  
 
-We shall see that when $\beta R = 1$ (a condition assumed by Milton Friedman and Robert Hall), this criterion assigns higher welfare to **smoother** consumption paths.
+We shall see that when $\beta R = 1$ (a condition assumed by Milton Friedman {cite}`Friedman1956` and Robert Hall {cite}`Hall1978`), this criterion assigns higher welfare to **smoother** consumption paths.
 
 Here we use default parameters $R = 1.05$, $g_1 = 1$, $g_2 = 1/2$, and $T = 65$. 
 
@@ -236,7 +236,7 @@ $$
 
 which says that the present value of the consumption stream equals the sum of finanical and non-financial wealth.
 
-Robert Hall (1978) showed that when $\beta R = 1$, a condition Milton Friedman had assumed,
+Robert Hall {cite}`Hall1978` showed that when $\beta R = 1$, a condition Milton Friedman had assumed,
 it is "optimal" for a consumer to **smooth consumption** by setting 
 
 $$