diff --git a/src/commands.rs b/src/commands.rs
index 13a9963f7..c4205a6bd 100644
--- a/src/commands.rs
+++ b/src/commands.rs
@@ -1,7 +1,8 @@
 //! The command line interface for the simulation.
+use crate::input::load_model;
+use crate::log;
 use crate::output::create_output_directory;
 use crate::settings::Settings;
-use crate::{input::load_model, log};
 use ::log::{error, info};
 use anyhow::{ensure, Context, Result};
 use clap::{Parser, Subcommand};
diff --git a/src/commodity.rs b/src/commodity.rs
index 5042a5fd5..4d4050847 100644
--- a/src/commodity.rs
+++ b/src/commodity.rs
@@ -1,5 +1,5 @@
 #![allow(missing_docs)]
-use crate::input::*;
+use crate::input::{define_id_getter, HasID};
 use crate::time_slice::{TimeSliceID, TimeSliceLevel};
 use indexmap::IndexMap;
 use serde::Deserialize;
diff --git a/src/input.rs b/src/input.rs
index 18a29fbce..7020b4a95 100644
--- a/src/input.rs
+++ b/src/input.rs
@@ -11,18 +11,18 @@ use std::fs;
 use std::path::Path;
 use std::rc::Rc;
 
-pub mod agent;
-pub use agent::read_agents;
-pub mod asset;
+mod agent;
+use agent::read_agents;
+mod asset;
 use asset::read_assets;
-pub mod commodity;
-pub use commodity::read_commodities;
-pub mod process;
-pub use process::read_processes;
-pub mod region;
-pub use region::read_regions;
+mod commodity;
+use commodity::read_commodities;
+mod process;
+use process::read_processes;
+mod region;
+use region::read_regions;
 mod time_slice;
-pub use time_slice::read_time_slice_info;
+use time_slice::read_time_slice_info;
 
 /// Read a series of type `T`s from a CSV file.
 ///
@@ -79,7 +79,7 @@ pub fn read_toml<T: DeserializeOwned>(file_path: &Path) -> Result<T> {
 }
 
 /// Read an f64, checking that it is between 0 and 1
-pub fn deserialise_proportion_nonzero<'de, D>(deserialiser: D) -> Result<f64, D::Error>
+fn deserialise_proportion_nonzero<'de, D>(deserialiser: D) -> Result<f64, D::Error>
 where
     D: Deserializer<'de>,
 {
@@ -142,7 +142,7 @@ impl IDCollection for HashSet<Rc<str>> {
 ///
 /// As this function is only ever used for top-level CSV files (i.e. the ones which actually define
 /// the IDs for a given type), we use an ordered map to maintain the order in the input files.
-pub fn read_csv_id_file<T>(file_path: &Path) -> Result<IndexMap<Rc<str>, T>>
+fn read_csv_id_file<T>(file_path: &Path) -> Result<IndexMap<Rc<str>, T>>
 where
     T: HasID + DeserializeOwned,
 {
@@ -197,7 +197,7 @@ where
 }
 
 /// Check that fractions sum to (approximately) one
-pub fn check_fractions_sum_to_one<I>(fractions: I) -> Result<()>
+fn check_fractions_sum_to_one<I>(fractions: I) -> Result<()>
 where
     I: Iterator<Item = f64>,
 {
diff --git a/src/input/agent.rs b/src/input/agent.rs
index 354575151..301168573 100644
--- a/src/input/agent.rs
+++ b/src/input/agent.rs
@@ -10,13 +10,13 @@ use std::collections::HashSet;
 use std::path::Path;
 use std::rc::Rc;
 
-pub mod objective;
+mod objective;
 use objective::read_agent_objectives;
-pub mod region;
+mod region;
 use region::read_agent_regions;
-pub mod search_space;
+mod search_space;
 use search_space::read_agent_search_space;
-pub mod commodity;
+mod commodity;
 use commodity::read_agent_commodities;
 
 const AGENT_FILE_NAME: &str = "agents.csv";
@@ -96,7 +96,7 @@ pub fn read_agents(
 /// # Returns
 ///
 /// A map of Agents, with the agent ID as the key
-pub fn read_agents_file(model_dir: &Path) -> Result<AgentMap> {
+fn read_agents_file(model_dir: &Path) -> Result<AgentMap> {
     let file_path = model_dir.join(AGENT_FILE_NAME);
     let agents_csv = read_csv(&file_path)?;
     read_agents_file_from_iter(agents_csv).with_context(|| input_err_msg(&file_path))
diff --git a/src/input/agent/commodity.rs b/src/input/agent/commodity.rs
index bf0424ffe..4575003ce 100644
--- a/src/input/agent/commodity.rs
+++ b/src/input/agent/commodity.rs
@@ -13,18 +13,18 @@ const AGENT_COMMODITIES_FILE_NAME: &str = "agent_commodities.csv";
 #[derive(PartialEq, Debug, Deserialize)]
 struct AgentCommodityRaw {
     /// Unique agent id identifying the agent.
-    pub agent_id: String,
+    agent_id: String,
     /// The commodity that the agent is responsible for.
-    pub commodity_id: String,
+    commodity_id: String,
     /// The year the commodity portion applies to.
-    pub year: u32,
+    year: u32,
     /// The proportion of the commodity production that the agent is responsible for.
     #[serde(deserialize_with = "deserialise_proportion_nonzero")]
-    pub commodity_portion: f64,
+    commodity_portion: f64,
 }
 
 impl AgentCommodityRaw {
-    pub fn to_agent_commodity(
+    fn to_agent_commodity(
         &self,
         commodities: &CommodityMap,
         milestone_years: &[u32],
diff --git a/src/input/agent/region.rs b/src/input/agent/region.rs
index b0d2e8069..10792325c 100644
--- a/src/input/agent/region.rs
+++ b/src/input/agent/region.rs
@@ -1,6 +1,6 @@
 //! Code for loading the agent regions CSV file.
-use crate::input::region::{define_region_id_getter, read_regions_for_entity};
-use crate::input::HasID;
+use super::super::region::{define_region_id_getter, read_regions_for_entity};
+use super::super::HasID;
 use crate::region::RegionSelection;
 use anyhow::Result;
 use serde::Deserialize;
diff --git a/src/input/agent/search_space.rs b/src/input/agent/search_space.rs
index ad1ac4774..ed0743a0f 100644
--- a/src/input/agent/search_space.rs
+++ b/src/input/agent/search_space.rs
@@ -13,18 +13,18 @@ const AGENT_SEARCH_SPACE_FILE_NAME: &str = "agent_search_space.csv";
 #[derive(PartialEq, Debug, Deserialize)]
 struct AgentSearchSpaceRaw {
     /// The agent to apply the search space to.
-    pub agent_id: String,
+    agent_id: String,
     /// The commodity to apply the search space to.
-    pub commodity_id: String,
+    commodity_id: String,
     /// The year to apply the search space to.
-    pub year: u32,
+    year: u32,
     /// The processes that the agent will consider investing in. Expressed as process IDs separated
     /// by semicolons or `None`, meaning all processes.
-    pub search_space: Option<String>,
+    search_space: Option<String>,
 }
 
 impl AgentSearchSpaceRaw {
-    pub fn to_agent_search_space(
+    fn to_agent_search_space(
         &self,
         process_ids: &HashSet<Rc<str>>,
         commodities: &CommodityMap,
diff --git a/src/input/asset.rs b/src/input/asset.rs
index 748a8800c..1a5497532 100644
--- a/src/input/asset.rs
+++ b/src/input/asset.rs
@@ -1,6 +1,6 @@
 //! Code for reading [Asset]s from a CSV file.
+use super::*;
 use crate::asset::Asset;
-use crate::input::*;
 use crate::process::ProcessMap;
 use anyhow::{ensure, Context, Result};
 use itertools::Itertools;
diff --git a/src/input/commodity.rs b/src/input/commodity.rs
index 8608b9e03..c8636e795 100644
--- a/src/input/commodity.rs
+++ b/src/input/commodity.rs
@@ -1,17 +1,17 @@
 //! Code for reading in commodity-related data from CSV files.
+use super::*;
 use crate::commodity::{Commodity, CommodityMap};
-use crate::input::*;
 use crate::time_slice::TimeSliceInfo;
 use anyhow::Result;
 use std::collections::HashSet;
 use std::path::Path;
 use std::rc::Rc;
 
-pub mod cost;
+mod cost;
 use cost::read_commodity_costs;
-pub mod demand;
+mod demand;
 use demand::read_demand;
-pub mod demand_slicing;
+mod demand_slicing;
 
 const COMMODITY_FILE_NAME: &str = "commodities.csv";
 
diff --git a/src/input/commodity/cost.rs b/src/input/commodity/cost.rs
index f41c1f2c9..b3012146c 100644
--- a/src/input/commodity/cost.rs
+++ b/src/input/commodity/cost.rs
@@ -1,6 +1,6 @@
 //! Code for reading in the commodity cost CSV file.
+use super::super::*;
 use crate::commodity::{BalanceType, CommodityCost, CommodityCostMap};
-use crate::input::*;
 use crate::time_slice::TimeSliceInfo;
 use anyhow::{ensure, Context, Result};
 use serde::Deserialize;
@@ -14,17 +14,17 @@ const COMMODITY_COSTS_FILE_NAME: &str = "commodity_costs.csv";
 #[derive(PartialEq, Debug, Deserialize, Clone)]
 struct CommodityCostRaw {
     /// Unique identifier for the commodity (e.g. "ELC")
-    pub commodity_id: String,
+    commodity_id: String,
     /// The region to which the commodity cost applies.
-    pub region_id: String,
+    region_id: String,
     /// Type of balance for application of cost.
-    pub balance_type: BalanceType,
+    balance_type: BalanceType,
     /// The year to which the cost applies.
-    pub year: u32,
+    year: u32,
     /// The time slice to which the cost applies.
-    pub time_slice: String,
+    time_slice: String,
     /// Cost per unit commodity. For example, if a CO2 price is specified in input data, it can be applied to net CO2 via this value.
-    pub value: f64,
+    value: f64,
 }
 
 /// Read costs associated with each commodity from commodity costs CSV file.
diff --git a/src/input/commodity/demand.rs b/src/input/commodity/demand.rs
index 7955e347b..59f7633ac 100644
--- a/src/input/commodity/demand.rs
+++ b/src/input/commodity/demand.rs
@@ -1,8 +1,8 @@
 //! Code for working with demand for a given commodity. Demand can vary by region, year and time
 //! slice.
+use super::super::*;
 use super::demand_slicing::{read_demand_slices, DemandSliceMap, DemandSliceMapKey};
 use crate::commodity::DemandMap;
-use crate::input::*;
 use crate::time_slice::TimeSliceInfo;
 use anyhow::{ensure, Result};
 use serde::Deserialize;
diff --git a/src/input/commodity/demand_slicing.rs b/src/input/commodity/demand_slicing.rs
index 901b42a5c..d954f6ab1 100644
--- a/src/input/commodity/demand_slicing.rs
+++ b/src/input/commodity/demand_slicing.rs
@@ -1,6 +1,6 @@
 //! Demand slicing determines how annual demand is distributed across the year.
+use super::super::*;
 use super::demand::*;
-use crate::input::*;
 use crate::time_slice::{TimeSliceID, TimeSliceInfo};
 use anyhow::{ensure, Context, Result};
 use itertools::Itertools;
diff --git a/src/input/process.rs b/src/input/process.rs
index 84a60cc1a..e57add416 100644
--- a/src/input/process.rs
+++ b/src/input/process.rs
@@ -1,22 +1,22 @@
 //! Code for reading process-related information from CSV files.
+use super::*;
 use crate::commodity::{Commodity, CommodityMap, CommodityType};
-use crate::input::*;
 use crate::process::{ActivityLimitsMap, Process, ProcessFlow, ProcessMap, ProcessParameter};
 use crate::region::RegionSelection;
 use crate::time_slice::TimeSliceInfo;
-use anyhow::Result;
+use anyhow::{bail, ensure, Context, Result};
 use serde::Deserialize;
 use std::collections::{HashMap, HashSet};
 use std::path::Path;
 use std::rc::Rc;
-pub mod availability;
+
+mod availability;
 use availability::read_process_availabilities;
-pub mod flow;
+mod flow;
 use flow::read_process_flows;
-pub mod parameter;
+mod parameter;
 use parameter::read_process_parameters;
-pub mod region;
-use anyhow::bail;
+mod region;
 use region::read_process_regions;
 
 const PROCESSES_FILE_NAME: &str = "processes.csv";
diff --git a/src/input/process/availability.rs b/src/input/process/availability.rs
index e1ca53dd4..ea71dbc1b 100644
--- a/src/input/process/availability.rs
+++ b/src/input/process/availability.rs
@@ -1,5 +1,5 @@
 //! Code for reading process availabilities CSV file
-use crate::input::*;
+use super::super::*;
 use crate::process::ActivityLimitsMap;
 use crate::time_slice::TimeSliceInfo;
 use anyhow::{Context, Result};
diff --git a/src/input/process/flow.rs b/src/input/process/flow.rs
index 14d5bf208..fd3b0037a 100644
--- a/src/input/process/flow.rs
+++ b/src/input/process/flow.rs
@@ -1,7 +1,7 @@
 //! Code for reading process flows file
+use super::super::*;
 use super::define_process_id_getter;
 use crate::commodity::CommodityMap;
-use crate::input::*;
 use crate::process::{FlowType, ProcessFlow};
 use anyhow::{ensure, Context, Result};
 use itertools::Itertools;
diff --git a/src/input/process/parameter.rs b/src/input/process/parameter.rs
index fdaa4bc17..40d6d4d0d 100644
--- a/src/input/process/parameter.rs
+++ b/src/input/process/parameter.rs
@@ -1,6 +1,6 @@
 //! Code for reading process parameters CSV file
+use super::super::*;
 use super::define_process_id_getter;
-use crate::input::*;
 use crate::process::ProcessParameter;
 use ::log::warn;
 use anyhow::{ensure, Context, Result};
@@ -14,15 +14,15 @@ const PROCESS_PARAMETERS_FILE_NAME: &str = "process_parameters.csv";
 
 #[derive(PartialEq, Debug, Deserialize)]
 struct ProcessParameterRaw {
-    pub process_id: String,
-    pub start_year: Option<u32>,
-    pub end_year: Option<u32>,
-    pub capital_cost: f64,
-    pub fixed_operating_cost: f64,
-    pub variable_operating_cost: f64,
-    pub lifetime: u32,
-    pub discount_rate: Option<f64>,
-    pub capacity_to_activity: Option<f64>,
+    process_id: String,
+    start_year: Option<u32>,
+    end_year: Option<u32>,
+    capital_cost: f64,
+    fixed_operating_cost: f64,
+    variable_operating_cost: f64,
+    lifetime: u32,
+    discount_rate: Option<f64>,
+    capacity_to_activity: Option<f64>,
 }
 define_process_id_getter! {ProcessParameterRaw}
 
diff --git a/src/input/process/region.rs b/src/input/process/region.rs
index f51a7b9f3..4c5607828 100644
--- a/src/input/process/region.rs
+++ b/src/input/process/region.rs
@@ -1,7 +1,7 @@
 //! Code for reading the process region CSV file
+use super::super::region::{define_region_id_getter, read_regions_for_entity};
+use super::super::*;
 use super::define_process_id_getter;
-use crate::input::region::{define_region_id_getter, read_regions_for_entity};
-use crate::input::*;
 use crate::region::RegionSelection;
 use anyhow::Result;
 use serde::Deserialize;
diff --git a/src/input/time_slice.rs b/src/input/time_slice.rs
index e828f12f1..55e6dad6d 100644
--- a/src/input/time_slice.rs
+++ b/src/input/time_slice.rs
@@ -1,8 +1,8 @@
 //! Code for reading in time slice info from a CSV file.
-use crate::input::*;
+use super::*;
 use crate::time_slice::{TimeSliceID, TimeSliceInfo};
 use anyhow::{ensure, Context, Result};
-use indexmap::IndexSet;
+use indexmap::{IndexMap, IndexSet};
 use serde::Deserialize;
 use std::path::Path;
 use std::rc::Rc;
diff --git a/src/model.rs b/src/model.rs
index 02b3c7c51..ab0c8ffcf 100644
--- a/src/model.rs
+++ b/src/model.rs
@@ -2,7 +2,7 @@
 #![allow(missing_docs)]
 use crate::agent::AgentMap;
 use crate::commodity::CommodityMap;
-use crate::input::*;
+use crate::input::{input_err_msg, read_toml};
 use crate::process::ProcessMap;
 use crate::region::RegionMap;
 use crate::time_slice::TimeSliceInfo;