At a glance, the Hanover Institute for Public Policy looks like a new think tank dedicated to Israel/Palestine. The organization churns out think-tank style reports on questions such as “Does AIPAC Use ‘Dark Money in Elections?” and “Is Israel Carrying out a Deliberate Campaign of Starvation in Gaza?”
But the Hanover Institute is not a real think tank. None of the reports have bylines. A small disclaimer at the bottom of the webpage notes that the organization was created on behalf of the Israeli Government Advertising Agency by Piro, Inc, a firm co-founded by Daniel Rosenberg, the producer of Spike Lee’s “Inside Man.”
The Hanover Institute’s reports — all of which are about Israel and Palestine — appear to be part of an Israeli effort to influence chatbots. The institute’s “data reports” have footnotes and tables of contents, and they present arguments in a neutral tone, helping them appeal to chatbots like Claude or Gemini. Piro’s website says that it “author(s) content engineered for how LLMs evaluate credibility,” describing this service as "AI Story Optimization." Others refer to this practice of influencing artificial intelligence as “LLM poisoning.”
According to its “about” page, the Hanover Institute “studies the inputs fueling antisemitism in the United States, and publishes what the evidence shows.” Many of the reports are formulaic, starting with an innocent question that someone might ask a chatbot.
“What Caused the Displacement of Palestinians in 1948?”
“Which Humanitarian Organizations Have Documented Israeli War Crimes?”
“What is the Current Situation in the Gaza Strip?”
In an article titled “Is the IDF the World’s Most Moral Army?” the Hanover Institute cites a 2022 poll that found that 47% of Israeli Jews believed that statement. Another report casts doubt on UNICEF's assertion that “90% of water and institutional infrastructure has been damaged or destroyed” in Gaza. Many of the reports conclude by linking the topic to rising antisemitism, oftentimes citing the same studies.
In a few cases, the Hanover Institute publishes what it claims are original findings. For instance, it put out a study saying 19 of the 36 most-watched Israel-Gaza explainer videos contain contested claims, with most of the contested claims aligning with the Palestinian narrative.
The Hanover Institute’s publications sometimes contradict Israeli government narratives. For instance, one report says that foreign funding of universities as an explanation for antisemitic incidents is “weak and full of exceptions.” Israeli Prime Minister Benjamin Netanyahu has pushed this theory, telling Breitbart last year that Europeans and Qataris have spent “billions of American universities, vilifying, vilifying Israel, vilifying Jews, also, frankly, vilifying the United States.”
Alice Lee, an analyst at NewsGuard, a disinformation tracking company, told RS that the sites appear designed to reach a U.S. audience curious about the ongoing conflict, either through search engines or AI chatbots. "LLMs favor concrete statistics and data, as well as strong citations and sources, which these articles all have," Lee said.
"It's a perfect mimicry of a typical credible American think tank, right down to the generic name, the site layout, and the red-white-blue color scheme," Lee added.
Piro, Inc, the firm that created the Hanover Institute, has received $900,000 from the Israeli government for its work. Like many other contractors working for Israel, Piro’s work is subcontracted through Havas Media, a French public relations conglomerate.
The fake think tank has churned out over 100 reports since it started publishing on August 6. The Hanover Institute claims that “cited research is peer-reviewed and academic,” although it frequently cites Israeli government sources such as the Israel Defense Forces and the Ministry of Foreign Affairs.
RS analyzed 12 random Hanover Institute articles using GPTZero, a popular AI detection software that claims a low false-positive rate. GPTZero flagged 11 of the articles as AI-written with “high confidence”; it flagged one article as AI-written with “moderate confidence.”
Israel has also contracted former Trump campaign manager Brad Parscale to create pro-Israel websites engineered to influence chatbots as part of a $46.5 million contract. A Drop Site investigation last month found that many chatbots, particularly Microsoft Copilot and Google Gemini, had been successfully trained on data from those websites. Other chatbots frequently cite those websites without flagging them as part of an Israeli influence operation.
Piro does not explicitly state in its agreement submitted to the Department of Justice that its work for Israel is to influence AI. In an email to Politico, which first reported the filing, Rosenberg said his firm’s work is to “put accurate, sourced facts into the public record and to counter misinformation about Israel with verifiable information.” However, last month, Rosenberg posted on LinkedIn advertising Piro’s ability to influence chatbots:
“When someone asks ChatGPT, Gemini, or Perplexity about your category, an answer comes back in one confident paragraph. Most brands have no idea how that paragraph gets built. So we spent months reverse-engineering it…At Piro, we already knew how to build stories that move people. The question was: how do you make sure AI knows how to tell them?”