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	<id>https://projectrebearth.com/index.php?action=history&amp;feed=atom&amp;title=Effects</id>
	<title>Effects - Revision history</title>
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	<updated>2026-04-16T07:02:44Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://projectrebearth.com/index.php?title=Effects&amp;diff=1062&amp;oldid=prev</id>
		<title>East6: Bot: Migrate wikitable → rb-table with themed frame</title>
		<link rel="alternate" type="text/html" href="https://projectrebearth.com/index.php?title=Effects&amp;diff=1062&amp;oldid=prev"/>
		<updated>2026-03-03T16:45:55Z</updated>

		<summary type="html">&lt;p&gt;Bot: Migrate wikitable → rb-table with themed frame&lt;/p&gt;
&lt;a href=&quot;https://projectrebearth.com/index.php?title=Effects&amp;amp;diff=1062&amp;amp;oldid=994&quot;&gt;Show changes&lt;/a&gt;</summary>
		<author><name>East6</name></author>
	</entry>
	<entry>
		<id>https://projectrebearth.com/index.php?title=Effects&amp;diff=994&amp;oldid=prev</id>
		<title>East6: Created page with &quot;&#039;&#039;&#039;Effects&#039;&#039;&#039; are multiplier-based modifiers applied by Choices, alliance types, and game events in Project Rebearth. Each effect targets a specific aspect of a settlement&#039;s economy or conditions, scaling the base values up or down. Multiple effects of the same type from different sources stack multiplicatively.  == Effect types == There are 14 effect types in the game. Each one modifies a different aspect of settlement operation.  {| clas...&quot;</title>
		<link rel="alternate" type="text/html" href="https://projectrebearth.com/index.php?title=Effects&amp;diff=994&amp;oldid=prev"/>
		<updated>2026-02-28T00:18:49Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;&amp;#039;&amp;#039;&amp;#039;Effects&amp;#039;&amp;#039;&amp;#039; are multiplier-based modifiers applied by &lt;a href=&quot;/index.php/Choices&quot; title=&quot;Choices&quot;&gt;Choices&lt;/a&gt;, &lt;a href=&quot;/index.php/Alliances&quot; title=&quot;Alliances&quot;&gt;alliance types&lt;/a&gt;, and game events in &lt;a href=&quot;/index.php/Main_Page&quot; title=&quot;Main Page&quot;&gt;Project Rebearth&lt;/a&gt;. Each effect targets a specific aspect of a settlement&amp;#039;s economy or conditions, scaling the base values up or down. Multiple effects of the same type from different sources stack multiplicatively.  == Effect types == There are 14 effect types in the game. Each one modifies a different aspect of settlement operation.  {| clas...&amp;quot;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;Effects&amp;#039;&amp;#039;&amp;#039; are multiplier-based modifiers applied by [[Choices]], [[Alliances|alliance types]], and game events in [[Main Page|Project Rebearth]]. Each effect targets a specific aspect of a settlement&amp;#039;s economy or conditions, scaling the base values up or down. Multiple effects of the same type from different sources stack multiplicatively.&lt;br /&gt;
&lt;br /&gt;
== Effect types ==&lt;br /&gt;
There are 14 effect types in the game. Each one modifies a different aspect of settlement operation.&lt;br /&gt;
&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Effect !! What it modifies !! Affected resources&lt;br /&gt;
|-&lt;br /&gt;
| Population growth || Rate at which new residents move into housing || [[Population]]&lt;br /&gt;
|-&lt;br /&gt;
| Food production || Output of all buildings that produce {{Icon|Food}} || {{Icon|Food}}&lt;br /&gt;
|-&lt;br /&gt;
| Food consumption || {{Icon|Food}} consumed by housing buildings || {{Icon|Food}}&lt;br /&gt;
|-&lt;br /&gt;
| Goods production || Output of buildings that produce raw materials || {{Icon|Wood}}, {{Icon|Stone}}, {{Icon|Earth}}&lt;br /&gt;
|-&lt;br /&gt;
| All production || Output of every production building || All resources&lt;br /&gt;
|-&lt;br /&gt;
| [[Happiness]] || Settlement happiness level || —&lt;br /&gt;
|-&lt;br /&gt;
| Raid risk || Probability of [[Raid]] events || —&lt;br /&gt;
|-&lt;br /&gt;
| Taxation || {{Icon|Coin}} income from the [[Taxation]] system || {{Icon|Coin}}&lt;br /&gt;
|-&lt;br /&gt;
| Export cost || Cost of selling goods through the [[Market]] or [[Port]] || —&lt;br /&gt;
|-&lt;br /&gt;
| Import cost || Cost of buying goods through the [[Market]] or [[Port]] || —&lt;br /&gt;
|-&lt;br /&gt;
| Research speed || Rate of {{Icon|Knowledge}} generation at the [[University]] || {{Icon|Knowledge}}&lt;br /&gt;
|-&lt;br /&gt;
| Expedition cost || {{Icon|Food}}, {{Icon|Knowledge}}, and [[Population]] costs of [[Expeditions]] || {{Icon|Food}}, {{Icon|Knowledge}}&lt;br /&gt;
|-&lt;br /&gt;
| Construction cost || Cost of constructing buildings || —&lt;br /&gt;
|-&lt;br /&gt;
| Accident rate || Probability of [[Accident]] events || —&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Sources ==&lt;br /&gt;
Effects are applied by [[Choices]], [[Alliances|alliance types]], and automatic game events. The following table lists every source of effects in the game.&lt;br /&gt;
&lt;br /&gt;
=== Population growth ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Cramped Quarters]] || ×1.3 || [[Choices|Choice]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Food production ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Vegan Society]] || ×1.2 || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Dubious Working Rules]] || ×1.1 || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Worker Safety]] || ×0.9 || [[Choices|Choice]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Food consumption ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Lavish Rations]] || ×1.2 || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Normal Rations]] || ×1.0 || [[Choices|Choice]] (default)&lt;br /&gt;
|-&lt;br /&gt;
| [[Low Rations]] || ×0.8 || [[Choices|Choice]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Goods production ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Dubious Working Rules]] || ×1.2 || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Worker Safety]] || ×0.8 || [[Choices|Choice]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== All production ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[New Town Boost]] || ×2.0 || Automatic (4 days)&lt;br /&gt;
|-&lt;br /&gt;
| [[Great Federation]] || ×1.1 || [[Alliances|Alliance type]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Science League]] || ×0.8 || [[Alliances|Alliance type]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Happiness ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Value !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Lavish Rations]] || +20% || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Worker Safety]] || +10% || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Science League]] || +10% || [[Alliances|Alliance type]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Dubious Working Rules]] || -20% || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Low Rations]] || -20% || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Cramped Quarters]] || -30% || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Taxation]] || -30% || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Food Shortage]] || -50% || Automatic&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Raid risk ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Trade Alliance]] || ×1.2 || [[Alliances|Alliance type]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Great Federation]] || ×0.8 || [[Alliances|Alliance type]]&lt;br /&gt;
|-&lt;br /&gt;
| [[New Town Boost]] || ×0.5 || Automatic (4 days)&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Taxation ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Trade Alliance]] || ×1.1 || [[Alliances|Alliance type]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Great Federation]] || ×0.8 || [[Alliances|Alliance type]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Export cost ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Import Focus]] || ×1.2 || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Neutral Focus]] || ×1.0 || [[Choices|Choice]] (default)&lt;br /&gt;
|-&lt;br /&gt;
| [[Trade Alliance]] || ×0.9 || [[Alliances|Alliance type]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Export Focus]] || ×0.85 || [[Choices|Choice]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Import cost ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Export Focus]] || ×1.2 || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Neutral Focus]] || ×1.0 || [[Choices|Choice]] (default)&lt;br /&gt;
|-&lt;br /&gt;
| [[Trade Alliance]] || ×0.9 || [[Alliances|Alliance type]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Import Focus]] || ×0.85 || [[Choices|Choice]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Research speed ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Science League]] || ×1.2 || [[Alliances|Alliance type]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Expedition cost ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Science League]] || ×0.8 || [[Alliances|Alliance type]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Construction cost ===&lt;br /&gt;
No choices or alliance types currently modify construction cost.&lt;br /&gt;
&lt;br /&gt;
=== Accident rate ===&lt;br /&gt;
{| class=&amp;quot;wikitable&amp;quot;&lt;br /&gt;
|-&lt;br /&gt;
! Source !! Multiplier !! Type&lt;br /&gt;
|-&lt;br /&gt;
| [[Dubious Working Rules]] || ×1.2 || [[Choices|Choice]]&lt;br /&gt;
|-&lt;br /&gt;
| [[Worker Safety]] || ×0.2 || [[Choices|Choice]]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== How effects work ==&lt;br /&gt;
Effects are expressed as multipliers applied to a base value. A multiplier of ×1.0 means no change, values above ×1.0 increase the stat, and values below ×1.0 decrease it. For example, [[Worker Safety]] applies a ×0.2 accident rate multiplier, reducing workplace accidents to 20% of their base frequency.&lt;br /&gt;
&lt;br /&gt;
When multiple effects of the same type are active (for example, from a choice and an alliance type), they stack multiplicatively. If a settlement has both [[Vegan Society]] (×1.2 food production) and [[Dubious Working Rules]] (×1.1 food production) active, the combined food production multiplier is ×1.32 (1.2 × 1.1).&lt;br /&gt;
&lt;br /&gt;
For cost-reducing effects like export cost and import cost, lower multipliers are better. A ×0.85 export cost multiplier means exports cost only 85% of the base price, saving the player 15% on every trade.&lt;br /&gt;
&lt;br /&gt;
== Changelog ==&lt;br /&gt;
{{Changelog}}&lt;br /&gt;
&lt;br /&gt;
== See also ==&lt;br /&gt;
* [[Choices]]&lt;br /&gt;
* [[Alliances]]&lt;br /&gt;
* [[Happiness]]&lt;br /&gt;
* [[Events]]&lt;br /&gt;
&lt;br /&gt;
{{Navbox}}&lt;br /&gt;
&lt;br /&gt;
[[Category:Game mechanics]]&lt;/div&gt;</summary>
		<author><name>East6</name></author>
	</entry>
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