Congress passes the Open Government Data Act, which requires public information to be open to the public by default in a machine readable format
On December 21, 2018, the United States House of Representatives voted to enact H.R. 4174, the Foundations for Evidence-Based Policymaking Act of 2017 …
Context & Ripple Effects
This vote caps a two-year arc in which Washington moved from experimenting with public data to legislating it. In 2016 the White House circulated a draft policy requiring federally developed software to be shareable across agencies (draft open source software policy), and MIT Media Lab built Data USA to show what comprehensive visualization of US government data could look like when the raw material was usable.
H.R. 4174, the Foundations for Evidence-Based Policymaking Act, converts that experimentation into a legal default: public information must be open and machine-readable unless there is a reason not to be. The follow-on coverage shows the arc completing — Trump signs the OPEN Government Data Act weeks later, directing agencies to default to publishing data when possible.
First-order effects
- Federal agencies flip from case-by-case disclosure to open-by-default publication, carrying the burden of justifying closed data rather than justifying release.
- Agencies must now produce machine-readable formats as standard output, making data infrastructure and metadata practice an operational requirement rather than a side project.
Second-order effects
- Analytics and visualization efforts like Data USA gain a systematically richer input layer, while commercial resellers whose value was packaging hard-to-get government data see that packaging margin compress.
- The statute pairs with the House's earlier transparency push on security practice — the Cyber Vulnerability Disclosure Reporting Act requiring DHS to report to Congress — signaling that lawmakers are building reporting obligations into agency operations across domains.
Third-order effects
- If open-by-default holds through implementation, the durable shift is from FOIA-era request-and-wait access to a standing public data supply, lowering the cost for any researcher, journalist, or company to build on government information.
- A statutory default also creates the governance question the next decade will argue over: where the permission boundary sits between openness and privacy or security carve-outs, since 'default open' still requires deciding what counts as a valid exception.
The trend: US government information policy is shifting from discretionary disclosure toward statutorily mandated open-by-default, machine-readable publication, with Congress setting the baseline and the White House executing it.