Lobbying is imagined as bribery and is largely information provision, relationship maintenance and procedural knowledge, which is more effective and harder to regulate.
What lobbyists do
Providing information to legislators and staff, who have limited capacity and face decisions across many technical fields.
Drafting language, since text has to come from somewhere and legislative drafting capacity is limited.
Monitoring, since knowing what is happening in committees requires sustained attention nobody else provides.
Coalition building among organisations with aligned interests.
And mobilising constituents to contact representatives.
Why information is the mechanism
Legislators cannot be expert in everything they vote on.
Which creates demand for information, and whoever supplies it shapes understanding.
Research on lobbying generally finds that access to provide information is what is being purchased rather than votes directly.
Information provided is accurate, since providing false information destroys the relationship, and it is selected.
The asymmetry
Concentrated interests with large stakes invest heavily. Diffuse interests with small individual stakes do not.
Which is the classic collective action problem, and it predicts that policy will favour concentrated interests systematically.
Empirical work finds this pattern, with business interests substantially outspending other categories in most systems that publish data.
Regulation
Registration and disclosure requirements exist in many jurisdictions.
Which produce data on who spends what on which issues, and coverage varies — some activities and some actors fall outside definitions.
Revolving door restrictions limit former officials from lobbying for defined periods, with varying scope and enforcement.
Gift and hospitality rules address the most obvious concerns and not the informational mechanism.
The revolving door
Movement between government and lobbying is extensively documented.
Which provides lobbyists with relationships and procedural knowledge, and provides officials with future employment prospects that may affect current behaviour.
Studies have found measurable value attached to former officials' connections, with lobbyist revenue falling when their former employer leaves office.
Campaign finance
Related and distinct, with different regulation.
Contribution limits, disclosure requirements and restrictions on sources vary enormously between jurisdictions.
Independent expenditure, spending not coordinated with a campaign, is regulated differently and in some systems is unlimited.
Which has shifted spending toward those channels where restrictions on direct contribution are tighter.
What the evidence shows about effect
Studies attempting to measure the effect of lobbying on outcomes find it difficult, since lobbying concentrates where outcomes are already likely.
Which means simple correlations overstate influence.
The better-identified studies generally find effects that are real and smaller than the popular assumption, and concentrated on technical details rather than headline positions.
Following it
Disclosure databases are public in many jurisdictions and searchable by issue, organisation and lobbyist.
Which allows the interested party to establish who is working on what, and it is used far more by journalists and researchers than by the public.
Grassroots and astroturf
Mobilising genuine constituent contact is legitimate advocacy.
Manufacturing the appearance of it, through organisations that conceal their funding, is what the second term describes.
Which is difficult to detect and has been documented in several investigations, including submissions to consultations that were generated rather than written.
Disclosure requirements for funding of advocacy organisations vary and are generally weaker than for direct lobbying.
Think tanks and research
Produce analysis that shapes debate, and their funding varies in transparency.
Which matters because research funded by an interested party can be genuinely rigorous and can also be selected and framed.
Organisations rating think tank funding transparency exist, and disclosure practices vary enormously.
International comparison
Lobbying regulation ranges from comprehensive registration regimes to essentially none.
Which means comparing disclosed lobbying activity between countries measures disclosure requirements as much as activity.
Legislative capacity
Legislatures with more research staff and analytical capacity depend less on outside information.
Which is a structural response to lobbying influence, and staffing levels have declined in several legislatures over decades.
Independent analytical bodies serving legislatures exist in several systems and provide a counterweight.
Transparency of meetings
Some jurisdictions require publication of ministerial and official meetings with outside parties.
Which produces data on who has access, and coverage and timeliness vary considerably.
Analysis of published meeting records has been used to document access patterns.
Public participation
Consultation processes, committee evidence and correspondence are open to anyone.
Which means individuals can participate through the same channels, and substantive submissions are read.
Organised interests dominate participation because they have capacity, not because access is restricted.
The information problem
Reducing dependence on interested information requires investment in independent analysis.
Which is cheap relative to the decisions involved and is politically unattractive since it funds process rather than outcomes.
Legislatures that maintained analytical capacity are less dependent, which is the structural response.
Public interest advocacy
Organisations advocating for diffuse interests exist and operate with far smaller resources than commercial interests.
Which means their influence depends on public attention and on the credibility of their evidence rather than on sustained access.
Their effectiveness has been greatest where they have generated public salience on a specific issue.