I am using `ecta` (Econometrica) style for references. I want to include URLs with them but `ecta` style does not support it. I tried using `note` and `howpublished` but it appears the `ecta` style overrides them. I also tried using `urlbst` package as suggested by @moewe [here](https://tex.stackexchange.com/questions/497530/hyperlinking-an-abbreviated-citation-to-its-reference-in-bibliography) but it throws up the following error even though I use the commands `\usepackage{urlbst}` (I am compiling the document online):

[![enter image description here](https://i.stack.imgur.com/08sHO.png)](https://i.stack.imgur.com/08sHO.png)

Sans `urlbest` package, I don't get the error but URLs don't show up in my references: 

[![enter image description here](https://i.stack.imgur.com/1RQC1.png)](https://i.stack.imgur.com/1RQC1.png)

Is there any way to include URLs with `ecta` style? Here's my MWE:

```
\documentclass[12pt,a4paper]{article}
\usepackage[english]{babel}
\usepackage{natbib}
\bibliographystyle{ecta}
\usepackage[colorlinks,citecolor=red]{hyperref}
\title{A Paper} 

\usepackage{filecontents}

\begin{filecontents}{\jobname.bib}
@article{fernandez2015fiscal,
title={Fiscal Volatility Shocks and Economic Activity},
author={Fern{\'a}ndez-Villaverde, Jes{\'u}s and Guerr{\'o}n-Quintana, Pablo 
and Kuester, Keith and Rubio-Ram{\'\i}rez, Juan},
journal={The American Economic Review},
volume={105},
number={11},
pages={3352--3384},
year={2015},
publisher={American Economic Association}
howpublished = {http://www.aeaweb.org/articles?id=10.1257/aer.20121236}
}
\end{filecontents}

\begin{document}
\maketitle

\section{Introduction}
\citet*{fernandez2015fiscal} look at \ldots 

\bibliography{\jobname}

\end{document}

```